Isosceles Triangle Angles Practice

Use the equal base angles of an isosceles triangle and the 180-degree angle sum to find a missing angle.

Math7th Grade

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01 Find a base angle in each isosceles triangle.

Use the triangle diagram and its measurements.

1. An isosceles triangle has vertex angle 75°. Find either base angle.

2. An isosceles triangle has vertex angle 25°. Find either base angle.

3. An isosceles triangle has vertex angle 36°. Find either base angle.

4. An isosceles triangle has vertex angle 47°. Find either base angle.

5. An isosceles triangle has vertex angle 58°. Find either base angle.

6. An isosceles triangle has vertex angle 69°. Find either base angle.

7. An isosceles triangle has vertex angle 80°. Find either base angle.

8. An isosceles triangle has vertex angle 30°. Find either base angle.