A student inscribes a triangle within a semicircle. What is the measure of
MNO?
N
M
O A. 120°
B. 180°
C. 60°
O D. 90°
![A student inscribes a triangle within a semicircle What is the measure of MNO N M O A 120 B 180 C 60 O D 90 class=](https://us-static.z-dn.net/files/d66/42260bfd67af6675466fcd6ee16f12f4.png)