SAT Geometry: Lines and Angles

1. In the diagram, line AB is parallel to line CD. If angle 1 = 50°, what is the measure of angle 2?

• 70°

• 90°

• 30°

• 50°

2. Given two intersecting lines, if angle A = 30°, what is the measure of angle B?

• 30°

• 90°

• 60°

• 45°

3. In triangle ABC, if angle A = 45° and angle B = 55°, what is the measure of angle C?

• 80°

• 90°

• 70°

• 100°

4. If two lines are cut by a transversal and the alternate interior angles are equal, what can be said about the lines?

• The lines are parallel.

• The lines intersect at an angle.

• The lines are coincident.

• The lines are perpendicular.

5. In the diagram, if angle X = 70° and angle Y is a linear pair with angle X, what is the measure of angle Y?

• 120°

• 110°

• 100°

• 90°

6. If angle 3 and angle 4 are corresponding angles and angle 3 = 120°, what is the measure of angle 4?

• 60°

• 150°

• 120°

• 90°

7. In a right triangle, if one angle is 30°, what is the measure of the other non-right angle?

• 90°

• 75°

• 60°

• 45°

8. If two lines are perpendicular, what is the sum of the angles formed at the intersection?

• 360 degrees

• 90 degrees

• 180 degrees

• 270 degrees

9. In the diagram, if angle P = 90° and angle Q = 45°, what is the measure of angle R in triangle PQR?

• 75°

• 30°

• 60°

• 45°

10. If angle 5 and angle 6 are supplementary and angle 5 = 110°, what is the measure of angle 6?

• 100°

• 80°

• 90°

• 70°