Test: Types of Triangles

1. Which of the following sets of interior angle measures would describe an acute isosceles triangle?
90°, 45°, 45°
80°, 60°, 60°
60°, 60°, 60°
60°, 50°, 50°

2. Which of the following sets of interior angle measures would describe an obtuse isosceles triangle?
90°, 45°, 45°
90°, 90°, 90°
100°, 50°, 50°
120°, 30°, 30°

3. Which of the following angle measurements would not describe an interior angle of a right angle?
30°
60°
90°
100°

4. If JNM is equilateral and equiangular, which condition would not exist?
mJN = mMN
JM JN
mN = mJ
mM = mNM

5. In isosceles ABC, if vertex A is twice the measure of base B, then C measures
30°.
33°.
45°.
90°.