Chapter CSB1.8, Problem 9E

To determine

To construct: Trace the given angle and angle congruent to it.

Explanation of Solution

Given:

The given figure is,

  

The trace of the given angle is shown below.

  

Congruent angle:

When two angles have same measurement, they are congruent.

The diagram shown below have two congruent angles. Both are equal to 90 degrees.

  $\angle \text{AOB}\cong \angle \text{AOC}$