Bluebook SAT Test Lines, Angles, and Triangles 1

Question 1

Two parallel lines are cut by a transversal. One co-interior (same-side interior) angle is 65°. What is the other co-interior angle?

Accepted Answer

115°

Answer

65°

Answer

125°

Answer

180°

Question 2

In a triangle, two angles measure 47° and 83°. What is the third angle?

Accepted Answer

50°

Answer

40°

Answer

60°

Answer

130°

Question 3

Two lines intersect and one angle measures 72°. What is the vertically opposite angle?

Accepted Answer

72°

Answer

18°

Answer

108°

Answer

144°

Question 4

A transversal crosses two parallel lines. One corresponding angle is 110°. What is the other corresponding angle?

Accepted Answer

110°

Answer

70°

Answer

80°

Answer

140°

Question 5

An isosceles triangle has a vertex angle of 40°. What is each base angle?

Accepted Answer

70°

Answer

40°

Answer

60°

Answer

140°

Question 6

The exterior angle of a triangle is 120°. One non-adjacent interior angle is 45°. What is the other non-adjacent interior angle?

Accepted Answer

75°

Answer

45°

Answer

60°

Answer

90°

Question 7

Two supplementary angles are in the ratio 1:3. What is the smaller angle?

Accepted Answer

45°

Answer

30°

Answer

60°

Answer

90°