Question

Which of the following are the measures of a right isosceles triangle?

A. 36°, 60°, 90°
B. 40°, 40°, 40°
C. 60°, 60°, 60°
D. 45°, 90°, 45°

Answer 1

D. 45 90 45. They add up

Answer 2

D. It is right, so one angle must be 90. The other two are the same, and must add to 90, so it is D.