Question

find m∠bec. m∠bec = \boxed{}°

Explanation:

Step1: Identify right angle at E

Line EB is perpendicular to AD, so $\angle BED = 90^\circ$.

Step2: Calculate $\angle BEC$

$\angle BEC = \angle BED - \angle CED = 90^\circ - 48^\circ$

Answer:

42°