Question

ABCD is an isosceles trapezoid. Calculate the angle BCD.

• A. ${40}^{\circ }$
• B. ${48}^{\circ }$
• C. ${78}^{\circ }$
• D. ${60}^{\circ }$

Answer 1

The correct option is B ${48}^{\circ }$

From the properties of an isosceles trapezoid, we know that the adjacent base angles are the same.
Here, ABC and BCD are the base angles.
Since, $\angle \text{ABC}={48}^{\circ }$
Therefore, $\angle \text{BCD}={48}^{\circ }$