Question

$\text{The measure of}\angle ADC\text{is}$ _______.

• A. 120°
• B. 90°
• C. 60°
• D. 30°

Answer 1

The correct option is C 60°

$\text{In}\Delta ADC,\text{all sides are equal.}\text{Hence it is an equilateral triangle.}$

$\text{Each angle of an equilateral triangle}\text{measures 60°.}\text{Hence,}\angle ADC\text{is}60°.$