Mathematics
Grade 5
15 min
Proofs involving isosceles triangles
Proofs involving isosceles triangles
Tutorial Preview
1
Find the base angles when the top angle is 80°.
2
Find the top angle when a base angle is 70°.
3
In Triangle ABC, side AB = side AC. Which angles are equal?
Sample Practice Questions
Easy
An isosceles triangle has a top angle of 100°. What is the measure of each base angle?
0.30°
1.40°
2.50°
3.80°
Easy
An isosceles triangle has a base angle of 50°. What is the measure of the top (vertex) angle?
0.50°
1.80°
2.90°
3.100°
Easy
In Triangle PQR, side PQ = side PR. Which two angles must be equal?
0.P and Q
1.Q and R
2.P and R
3.All
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing Free