Question

which angle is complementary to ∠cpd?

Explanation:

Step1: Recall complementary - angle definition

Two angles are complementary if their sum is 90 degrees.

Step2: Identify right - angle in the figure

Assume there is a right - angle formed at point P. If one of the angles in the right - angle is ∠CPD, the other angle that forms the right - angle with it is complementary.

Step3: Determine the complementary angle

If we assume that the right - angle is composed of ∠CPD and ∠DPE, then ∠DPE is complementary to ∠CPD.

Answer:

∠DPE