Question

estimate the measure of this angle within 10°.

Explanation:

Step1: Recall angle - types

A right - angle is 90°. This angle is larger than 90°.

Step2: Compare with known angles

A straight - angle is 180°. This angle is less than 180°. It looks like it is about 120° as it is closer to 90° than to 180° and a reasonable estimate within 10°.

Answer:

120