Chapter 11.5, Problem 26CCR

To determine

To determine $m\angle A$ value.

Answer to Problem 26CCR

  $m\angle A=73°$

Explanation of Solution

Given:

  $m\angle B=17°$

  $\angle A$ and $\angle B$ are complimentary angle

Calculation:

If $\angle A$ and $\angle B$ are complimentary angles, then

  $\Rightarrow \angle A+\angle B=90°$

Putting the value of $m\angle B=17°$ ,

  $\Rightarrow \angle A+17°=90°$

  $\Rightarrow \angle A=90°-17°$

  $\Rightarrow \angle A=73°$

Conclusion:

Therefore, the value is $m\angle A=73°.$