Question

estimate the measure of this angle within 10°.

Explanation:

Step1: Recall angle - size references

Compare with known angles.

Step2: Estimate

The angle looks close to a 30 - degree angle. A 30 - degree angle is one - sixth of a full - circle (360°) and is smaller than a 45 - degree angle. Since we need an estimate within 10°, 30° is a reasonable estimate.

Answer:

30