Answer:
152°
Explanation:
Intercepted arc is going to be two times the inscribed angle. We can see that angle A is subtended by arc BCD. (See attached picture.)
Step 1: Find angle A.
Angles in quadrilateral add up to 360°.
m∠A + m∠B + m∠C + m∠D = 360°
m∠A + 120° + 104° + 60° = 360°
m∠A + 284° = 360°
m∠A = 76°
Step 2: Find the measure of arc BCD.
Intercepted arc is going to be two times the inscribed angle.
measure of arc BCD = 2 × m∠A = 2 × 76° = 152°