Question

find the measure of the arc. m\widehat{de} = ?°

Explanation:

Step1: Recall the property of a right angle

A right angle measures \(90^{\circ}\).

Step2: Calculate the measure of arc \(\overarc{DE}\)

Since \(\overarc{DE}\) is subtended by a right - angle at the center of the circle, \(m\overarc{DE}=90^{\circ}\).

Answer:

\(90\)