SAT MATH • ANSWER CHECK

Lines & Angles

Complete the practice first, then open each answer to check your work. These answers match the revised September 2026 worksheets.

Practice PDF Back to topics Handbook

For a wrong answer, identify the cause: concept, algebra, arithmetic, interpretation, calculator choice, or timing. Equivalent exact numerical forms are accepted for these practice exercises.

Question 1

Answer: 70°

Question 2

Answer: 38°

Question 3

Answer: 81°

Question 4

Answer: B

B. 60

Question 5

Answer: B

B. 55

Question 6

Answer: B

B. 140

Question 7

Answer: 20

Question 8

Answer: 85°

Question 9

Answer: C

C. 20

Question 10

Answer: 36°

Question 11

Answer: D

D. 67.5

Question 12

Answer: 100°

Question 13

Answer: B

B. 90

Question 14

Answer: C

C. 38.6

x + y = 90 and y = 4x/3, so x = 270/7 ≈ 38.6°.

Question 15

Answer: 1/9

Question 16

Answer: 90°

Question 17

Answer: 10:7