75 points !
δabc rotates 90° clockwise about point p to produce δa'b'c'.
m∠cpc' is

The correct answer for the question that is being presented above is this one: "90 degrees." When we rotate the triangle 90 degrees; it's basically upside down. A triangle has 18- degrees therefore 90 is correct.

Here are the following choices:
50° 60° 70° 90°