Question

estimate the measure of this angle within 15°.

Explanation:

Step1: Recall angle - type knowledge

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

Step2: Make an estimate

We know that a straight - angle is 180°. This angle is about $\frac{3}{5}$ of a straight - angle. $\frac{3}{5}\times180 = 108$. Rounding to the nearest 15°, we get 105°.

Answer:

105