Question

estimate the measure of this angle within 15°.

Explanation:

Step1: Identify the angle type

The angle has one vertical ray and one horizontal ray, forming a right angle. A right angle is known to be \(90^\circ\).

Step2: Check the estimation range

The problem asks to estimate within \(15^\circ\). Since the angle is a right angle, its measure is \(90^\circ\), which is within the acceptable range (as \(90^\circ \pm 15^\circ\) would be \(75^\circ\) to \(105^\circ\), and \(90^\circ\) is in this interval).

Answer:

\(90^\circ\)