Question

estimate the measure of this angle within 15°.

Explanation:

Step1: Recall angle - types knowledge

Acute angles are less than 90°. This angle appears acute.

Step2: Make an estimate

A 45 - degree angle would have the two rays at a 45 - degree separation. This angle looks close to 45°. Since we need an estimate within 15°, values in the range of 30° - 60° are acceptable. A reasonable estimate is 45°.

Answer:

45