Question

estimate the measure of this angle within 10°.

Explanation:

Step1: Recall angle types

An acute angle is less than \(90^{\circ}\), a right angle is \(90^{\circ}\), and an obtuse angle is greater than \(90^{\circ}\). This angle is acute.

Step2: Estimate based on common angles

A \(60^{\circ}\) angle (like in an equilateral - triangle - based angle) is a common reference. This angle looks a bit larger than \(45^{\circ}\) (a half - right - angle) but less than \(70^{\circ}\). A reasonable estimate within \(10^{\circ}\) is \(60^{\circ}\).

Answer:

\(60\)