Question

If two angles of a triangle measure 40° and 70° what is the measure of the third angle

Answer 1

Given,

The two angles of a triangle measure 40 degrees and 70 degrees.

To find: The measure of the third angle.

Solution:

Let the third angle be x.

The sum of all the interior angles of the triangle are 180 degrees.

$\begin{gathered} x+40+70=180 \\ x+110=180 \\ x=180-110 \\ x=70\text{ } \end{gathered}$

Thus, the third angle is 70 degrees.