Question

what is the value of c?

Explanation:

Step1: Recall angle - sum property

The two angles on the straight - line are supplementary. The sum of two supplementary angles is $180^{\circ}$.

Step2: Set up the equation

Let the given angle be $147^{\circ}$ and the unknown angle be $c$. Then $147^{\circ}+c = 180^{\circ}$.

Step3: Solve for $c$

$c=180^{\circ}-147^{\circ}=33^{\circ}$.

Answer:

$33^{\circ}$