Question

The measures of two angles of a triangle are given. Find the measure of the third angle.

$39°,65°$

Answer 1

Finding the measure of the third angle

We know that,

According to the angle sum property of the triangle , sum of all interior angles is $180°$.

Here, given two angles are $39°,65°$

Therefore,

$39°+65°+thirdangle=180°$
$\begin{array}{rcl}\mathrm{third}\mathrm{angle}& =& 180°-(39°+65°)\\ & =& 180°-104°\\ & =& 76°\end{array}$
Hence, the measure of the third angle is $76°$.