Chapter E, Problem 3.3EX

To determine

To Find:

The measure of $\angle D$ .

Answer to Problem 3.3EX

The measure of $\angle D$ is option (b) ${80}^{\circ }$ .

Explanation of Solution

Given information:

If $A\overline{B}\parallel D\overline{C}$ in the given figure.

If $A\overline{B}\parallel D\overline{C}$ , then by the property angles on the same side of transversal is supplementary.

We get the measure of $\angle D$ to be ${80}^{\circ }$ .

Therefore, the measure of $\angle D$ is option (b) ${80}^{\circ }$ .