Question

for items 15 - 16, refer to the following figure. what is the sum of m∠abd, m∠dbe, and m∠ebc? a. 90° b. 115.5° c. 154.5° d. 180°

Explanation:

Step1: Identify angle - relationship

Angles $\angle ABD$, $\angle DBE$, and $\angle EBC$ form a straight - line at point $B$.

Step2: Recall angle - sum property

The sum of angles on a straight line is $180^{\circ}$.

Answer:

D. $180^{\circ}$