in circle P, what is the measure of CD

Answer:
Measure of CD = 52°
Step-by-step explanation:
In a circle P, AC is the diameter.
We have to find the measure of arc CD.
Since ∠DPC + ∠APD = 180° (supplementary angles)
∠DPC + 128 = 180
∠DPC = 180 - 128 = 52°
Therefore the length of arc CD will be = 52°