The answer is 135°.
The circle has 360°. If it is divided into 8 equal sections, the measure of the angle of each section is 45°:
360° / 8 = 45°
Matt drew an angle that measures the same as the total measure of the 3 sections in the circle. So, the measure of the angle Matt drew is 135°:
3 * 45° = 135°
