Attempt following question by selecting a choice to answer.
c
What is the measure of
∠AOB?
DDDD ccccA.
cless than 90°
B.
cabout 90°
C.
cabout 180°
D.
cabout 120°
cc
D
Step 1: The measure of ∠AOB is greater than 90° but less than 180°.
Step 2: So, ∠AOB is an obtuse angle.
Step 3: Among the choices, 120° is the only obtuse angle.
Step 4: So, measure of ∠AOB is about 120°.