Quiz

Grade 8: Angles, circles and congruence

10 questions with solutions for grade 8: angles with parallel and perpendicular arms, parts of a circle, inscribed angles, congruence and its tests.

Type the number or choose the right answer. When you finish, click Check answers and see the solutions.

1. Two acute angles have parallel arms. One is 50°. What is the other?Enter a number only

2. Angles with perpendicular arms: one acute 35°, the other obtuse. How big is the obtuse one?Enter a number only

3. The central angle on an arc is 100°. What is the inscribed angle on the same arc?Enter a number only

4. How many degrees is an inscribed angle on a diameter?Enter a number only

5. An inscribed angle is 35°. What is the central angle on the same arc?Enter a number only

6. Which test does NOT guarantee congruent triangles?

A. SSS

B. SAS

C. ASA

D. three equal angles (AAA)

7. △ABC ≅ △DEF, ∠A = 50°, ∠B = 60°. How many degrees is ∠F?Enter a number only

8. How many degrees do the exterior angles of a triangle add up to?Enter a number only

9. The two interior angles not next to an exterior angle are 40° and 65°. How big is the exterior angle?Enter a number only

10. A chord is equal to the radius. How many degrees is the central angle on it?Enter a number only