Question

estimate the measure of this angle within 15°.

Explanation:

Step1: Recall common - angle benchmarks

We know that a right - angle is 90°, a straight - angle is 180°, and a 45° angle is half of a right - angle. This angle is less than a right - angle.

Step2: Make an estimate

By comparing with the 45° benchmark, this angle looks to be around 45°. Since we need to estimate within 15°, a reasonable estimate could be 45°.

Answer:

45