Question

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

$55°$$,65°$

Answer 1

Find the measure of the third angle:

Let the third angle be $x$.

We know from the angle sum property of the triangle;

Sum of all interior angles of a triangle is $180°$.

$\Rightarrow$$x+55°+65°=180°$

$\Rightarrow$ $x=180°-120°$

$\Rightarrow$ $x=60°$

Thus, the required third angle will be $60°$.