These are the questions most test-takers get right. They are worth practising anyway: on the digital SAT the easy questions in Module 1 are what route you into the harder, higher-scoring Module 2, so dropping one costs more than it looks.
Every question below is a real item from the SAT Climb bank, tagged easy by the same difficulty model the app uses to build your practice. Pick an answer before you open the explanation.
Math · Geometry and Trigonometry~2 per testEasy tier
In the figure, line s is parallel to line t, and line u intersects both lines. At the intersection of line u and line s, the angle in the bottom left measures 73°. At the intersection of line u and line t, the angle in the bottom right measures y°. What is the value of y?
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Why C is right
When two parallel lines are cut by a transversal, consecutive interior angles on the same side of the transversal are supplementary. The 73° angle and the y° angle are consecutive interior angles, so 73+y=180. Subtracting 73 from both sides gives y=107.
Why the others are wrong
AThis incorrectly treats the angles as complementary (summing to 90°) rather than supplementary, calculating 90 - 73 = 17.
BThis incorrectly assumes the angles are alternate interior angles and therefore equal, but they are consecutive interior angles on the same side of the transversal.
DThis incorrectly adds 180 and 73 rather than recognizing that the two angles are supplementary and must sum to 180.
Question 2Easy
In triangle XYZ, angle X measures 74° and angle Y measures 49°. What is the value of angle Z?
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Why C is right
The sum of the interior angles of a triangle is 180°. Therefore, 74+49+Z=180. Adding 74 and 49 gives 123, so 123+Z=180. Subtracting 123 from both sides yields Z=57.
Why the others are wrong
AThis results from incorrectly subtracting 49 - 74 and taking the absolute value, or 74 - 49.
BThis results from incorrectly treating the angles as complementary to 49° (90 - 49 = 41).
DThis results from adding 74 + 49 instead of finding the third angle that completes the sum to 180°.
Question 3Easy
In triangles ABC and DEF, angles A and D are congruent and angles B and E are congruent. The length of side AB is 6, the length of side BC is 9, and the length of side DE is 4. What is the length of side EF?
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Why B is right
Since angles A and D are congruent and angles B and E are congruent, triangles ABC and DEF are similar by AA similarity. Corresponding sides are proportional, so AB/DE = BC/EF. Substituting the given values: 6/4 = 9/EF. Cross-multiplying gives 6·EF = 36, so EF = 6.
Why the others are wrong
AThis results from incorrectly setting up the proportion as DE/AB = EF/BC and computing 4/6 · 9 = 6, then making an arithmetic error.
CThis results from incorrectly adding DE and BC instead of using the proportionality relationship: 4 + 4 = 8.
DThis results from incorrectly using the proportion AB/BC = DE/EF, which reverses the correspondence, yielding 6/9 = 4/EF and EF = 6, but then multiplying by the wrong factor to get 13.5.
Question 4Easy
In the figure, line p is parallel to line q, and line r intersects both lines. At the intersection of line r and line p, the angle in the bottom right measures 58°. At the intersection of line r and line q, the angle in the bottom left measures x°. What is the value of x?
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Why D is right
When two parallel lines are cut by a transversal, consecutive interior angles on the same side are supplementary. The angle measuring 58° and the angle measuring x° are consecutive interior angles, so 58+x=180. Solving gives x=122.
Why the others are wrong
AThis results from incorrectly finding the complementary angle (90 - 58 = 32) instead of recognizing supplementary consecutive interior angles.
BThis results from incorrectly assuming the angles are equal (like alternate interior angles) instead of recognizing they are supplementary consecutive interior angles.
CThis results from incorrectly adding the given angle to itself (58 + 58 = 116) instead of recognizing the supplementary relationship.
Question 5Easy
In triangle ABC, angle A measures 52° and angle B measures 67°. What is the value of angle C?
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Why C is right
The sum of the interior angles of a triangle is 180°. Therefore, 52+67+C=180. Adding 52 and 67 gives 119, so 119+C=180. Subtracting 119 from both sides yields C=61.
Why the others are wrong
AThis results from incorrectly subtracting 67 - 52 instead of using the triangle angle sum.
BThis results from incorrectly treating the angles as complementary to 52° (90 - 52 = 38).
DThis results from adding 52 + 67 instead of finding the third angle that completes the sum to 180°.
Question 6Easy
In triangles ABC and DEF, angles A and D are congruent and angles C and F are congruent. The length of side AC is 10, the length of side AB is 15, and the length of side DF is 8. What is the length of side DE?
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Why C is right
Since angles A and D are congruent and angles C and F are congruent, triangles ABC and DEF are similar by AA similarity. Corresponding sides are proportional, so AC/DF = AB/DE. Substituting the given values: 10/8 = 15/DE. Cross-multiplying gives 10·DE = 120, so DE = 12.
Why the others are wrong
AThis results from incorrectly using the proportion DF/AB = AC/DE, yielding 8/15 = 10/DE and DE = 18.75, then making an arithmetic error to get 5.33.
BThis results from incorrectly adding DF and a portion of AB instead of using proportionality: 8 + 3 = 11.
DThis results from incorrectly setting up the proportion as DF/AC = AB/DE, yielding 8/10 = 15/DE and DE = 18.75.
Question 7Easy
In the figure, line r is parallel to line s, and line u intersects both lines. At the intersection of line u and line r, the angle in the bottom right position measures 52°. At the intersection of line u and line s, the angle in the top right position measures v°. What is the value of v?
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Why D is right
Since line r is parallel to line s with transversal u, the 52° angle and v° are consecutive interior angles on the same side of the transversal, so they are supplementary. Therefore, 52+v=180, giving v=128.
Why the others are wrong
AThis is the result of incorrectly treating the angles as complementary (summing to 90°) rather than supplementary (summing to 180°).
BThis incorrectly assumes the angles are alternate interior angles (which would be equal) rather than consecutive interior angles that must sum to 180°.
CThis is the result of incorrectly doubling 52 rather than recognizing that the angles are supplementary and require subtraction from 180.
Question 8Easy
In triangle PQR, angle P measures 38° and angle Q measures 85°. What is the value of angle R?
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Why C is right
The sum of the interior angles of a triangle is 180°. Therefore, 38+85+R=180. Adding 38 and 85 gives 123, so 123+R=180. Subtracting 123 from both sides yields R=57.
Why the others are wrong
AThis results from incorrectly subtracting 85 - 38 instead of using the triangle angle sum.
BThis results from incorrectly treating the angles as complementary to 38° (90 - 38 = 52).
DThis results from adding 38 + 85 instead of finding the third angle that completes the sum to 180°.
Question 9Easy
In the figure, line q is parallel to line r, and line t intersects both lines. At the intersection of line t and line q, the angle in the bottom right position measures 48°. At the intersection of line t and line r, the angle in the top right position measures m°. What is the value of m?
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Why D is right
Since line q is parallel to line r with transversal t, the 48° angle and m° are consecutive interior angles on the same side of the transversal, making them supplementary. Therefore, 48+m=180, so m=132.
Why the others are wrong
AThis is the result of incorrectly treating the angles as complementary (summing to 90°) rather than supplementary (summing to 180°).
BThis incorrectly assumes the angles are alternate interior angles (which would be equal) rather than consecutive interior angles that are supplementary.
CThis is the result of incorrectly doubling 48 rather than recognizing that the angles are supplementary and require subtraction from 180.
Question 10Easy
In the figure, line a is parallel to line b, and line c intersects both lines. At the intersection of line c and line a, the angle in the top left measures 51°. At the intersection of line c and line b, the angle in the top right measures z°. What is the value of z?
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Why C is right
When two parallel lines are cut by a transversal, consecutive interior angles are supplementary. The 51° angle at line a and the z° angle at line b are consecutive interior angles, so 51+z=180. Subtracting 51 from both sides gives z=129.
Why the others are wrong
AThis incorrectly treats the angles as complementary (summing to 90°), calculating 90 - 51 = 39.
BThis incorrectly identifies the angles as alternate interior angles and assumes they are equal, but they are consecutive interior angles.
DThis incorrectly adds 180 and 51 instead of recognizing that the sum of the two angles equals 180.
Question 11Easy
In the figure, line d is parallel to line e, and line f intersects both lines. At the intersection of line f and line d, the angle in the top left measures x°. At the intersection of line f and line e, the angle in the bottom right measures 118°. What is the value of x?
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Why C is right
When two parallel lines are cut by a transversal, alternate interior angles are equal. The angle measuring x° at line d and the angle measuring 118° at line e are alternate interior angles, so x=118.
Why the others are wrong
AThis results from incorrectly finding the complementary angle (90 - 62 = 28, where 62 comes from an error) instead of recognizing equal alternate interior angles.
BThis results from incorrectly using the supplementary angle (180 - 118 = 62) instead of recognizing that alternate interior angles are equal.
DThis results from incorrectly adding the given angle to itself (118 + 118 = 236) instead of recognizing equal alternate interior angles.
Question 12Easy
In the figure, line r is parallel to line s, and line t intersects both lines. At the intersection of line t and line r, the angle in the bottom left position measures 67°. At the intersection of line t and line s, the angle in the bottom right position measures x°. What is the value of x?
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Why C is right
Since line r is parallel to line s with transversal t, consecutive interior angles are supplementary. The 67° angle and x° are consecutive interior angles on the same side of the transversal, so 67+x=180, giving x=113.
Why the others are wrong
AThis results from incorrectly treating the angles as complementary (90 - 67 = 23) rather than supplementary.
BThis results from incorrectly assuming the angles are alternate interior angles (which would be equal) rather than consecutive interior angles.
DThis results from incorrectly adding the angles (67 + 67 = 134) rather than recognizing they are supplementary.
Question 13Easy
In the figure, line k is parallel to line m, and line n intersects both lines. At the intersection of line n and line k, the angle in the upper left measures 39°. At the intersection of line n and line m, the angle in the upper right measures p°. What is the value of p?
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Why C is right
When two parallel lines are cut by a transversal, consecutive interior angles are supplementary. The 39° angle at line k and the p° angle at line m are consecutive interior angles, so 39+p=180. Subtracting 39 from both sides gives p=141.
Why the others are wrong
AThis incorrectly assumes the angles are alternate interior angles and therefore equal, but they are consecutive interior angles.
BThis incorrectly treats the angles as complementary (summing to 90°), calculating 90 - 39 = 51.
DThis incorrectly adds 180 and 39 instead of recognizing that the sum of the two angles equals 180.
Question 14Easy
In the figure, line x is parallel to line y, and line z intersects both lines. At the intersection of line z and line x, the angle in the bottom left position measures 85°. At the intersection of line z and line y, the angle in the bottom right position measures w°. What is the value of w?
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Why C is right
Since line x is parallel to line y with transversal z, consecutive interior angles are supplementary. The 85° angle and w° are consecutive interior angles on the same side of the transversal, so 85+w=180, giving w=95.
Why the others are wrong
AThis results from incorrectly treating the angles as complementary (90 - 85 = 5) rather than supplementary.
BThis results from incorrectly assuming the angles are alternate interior angles (which would be equal) rather than consecutive interior angles.
DThis results from incorrectly adding the angles (85 + 85 = 170) rather than recognizing they are supplementary.
Question 15Easy
In the figure, line g is parallel to line h, and line j intersects both lines. At the intersection of line j and line g, the angle in the bottom right position measures 71°. At the intersection of line j and line h, the angle in the top left position measures v°. What is the value of v?
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Why B is right
Since line g is parallel to line h and line j is a transversal, alternate interior angles are equal. The angle measuring 71° at line g and the angle measuring v° at line h are alternate interior angles, so v=71.
Why the others are wrong
AThis results from incorrectly treating the angles as complementary (90 - 71 = 19) rather than recognizing they are alternate interior angles.
CThis results from incorrectly using the supplementary angle (180 - 71 = 109) rather than the alternate interior angle relationship.
DThis results from incorrectly doubling the given angle (71 × 2 = 142) rather than recognizing alternate interior angles are equal.
Question 16Easy
In the figure, line c is parallel to line d, and line e intersects both lines. At the intersection of line e and line c, the angle in the top right position measures 46°. At the intersection of line e and line d, the angle in the bottom left position measures n°. What is the value of n?
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Why B is right
Since line c is parallel to line d and line e is a transversal, alternate interior angles are equal. The angle measuring 46° at line c and the angle measuring n° at line d are alternate interior angles, so n=46.
Why the others are wrong
AThis results from incorrectly treating the angles as complementary (90 - 46 = 44) rather than recognizing they are alternate interior angles.
CThis results from incorrectly doubling the given angle (46 × 2 = 92) rather than recognizing alternate interior angles are equal.
DThis results from incorrectly using the supplementary angle (180 - 46 = 134) rather than the alternate interior angle relationship.
Question 17Easy
In the figure, line j is parallel to line k, and line s intersects both lines. At the intersection of line s and line j, the angle in the top left position measures 63°. At the intersection of line s and line k, the angle in the top right position measures w°. What is the value of w?
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Why C is right
Since line j is parallel to line k with transversal s, consecutive interior angles on the same side are supplementary. The 63° angle and w° are consecutive interior angles, so 63+w=180, giving w=117.
Why the others are wrong
AThis is the result of incorrectly treating the angles as complementary (summing to 90°) rather than supplementary (summing to 180°).
BThis incorrectly assumes the angles are alternate interior angles (which would be equal) rather than consecutive interior angles on the same side.
DThis is the result of incorrectly adding 63 and 63 rather than using subtraction to find the supplementary angle.
Question 18Easy
In the figure, line g is parallel to line h, and line k intersects both lines. At the intersection of line k and line g, the angle in the top right position measures 73°. At the intersection of line k and line h, the angle in the bottom right position measures p°. What is the value of p?
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Why B is right
When two parallel lines are cut by a transversal, alternate interior angles are equal, and supplementary angles form a straight line. The angle at line g measuring 73° and its supplement at line g measure 107°. The angle p° is an alternate interior angle to this 107° angle, so p=107.
Why the others are wrong
AThis incorrectly assumes p is equal to the given angle as if they were corresponding angles.
CThis incorrectly treats the angles as complementary and calculates 90 - 73.
DThis incorrectly adds 73 and 90 rather than finding the correct relationship.
Question 19Easy
In the figure, line m is parallel to line n, and line k intersects both lines. At the intersection of line k and line m, the angle in the top right position measures 54°. At the intersection of line k and line n, the angle in the bottom left position measures w°. What is the value of w?
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Why C is right
When two parallel lines are cut by a transversal, alternate interior angles are equal. The angle measuring 54° at line m and the angle measuring w° at line n are alternate interior angles, so w=54.
Why the others are wrong
AThis is the result of incorrectly using a supplementary relationship (180 - 54 = 126) rather than recognizing the angles are equal.
BThis is the result of incorrectly treating the angles as complementary (90 - 54 = 36) rather than equal alternate interior angles.
DThis incorrectly assumes the angles form a right angle rather than recognizing the alternate interior angle relationship.
Question 20Easy
In the figure, line m is parallel to line n, and line t intersects both lines. At the intersection of line t and line m, the angle on the bottom right measures 55°. At the intersection of line t and line n, the angle on the bottom left measures z°. What is the value of z?
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Why A is right
When two parallel lines are cut by a transversal, consecutive interior angles on the same side are supplementary. The angles measuring 55° and z° are consecutive interior angles, so 55+z=180. Solving gives z=125.
Why the others are wrong
BThis incorrectly treats the angles as equal vertical angles rather than as supplementary consecutive interior angles.
CThis incorrectly treats the angles as complementary (summing to 90°) rather than as supplementary (summing to 180°).
DThis incorrectly adds the two angles rather than recognizing they must sum to 180°.
What to do after easy
Getting these right quickly is the point: speed on the easy questions is what buys time for the hard ones. When they stop costing you effort, move up.
Questions are written by SAT Climb and drawn from its own item bank. SAT® is a registered trademark of College Board, which is not affiliated with and does not endorse SAT Climb.