Question

Find the value of m∠ADC.
A. 90º
B. 117º
C. 18º
D. 24º

Answer 1

A

Explanation:

∠ADC is the same thing as ∠D. ∠D has the little right-angle symbol. Thus, ∠D is a right angle. All right angles are 90°. Therefore, ∠D or ∠ADC is 90°.

Answer 2

A. 90°

Explanation:

Any angle that has a box on it denotes that the angle is a right angle.

Definition of a right angle is 90°.

So our answer must be 90°