Question

One of the angles of a triangle is $100°$ and other two angles are equal. Find each of the equal angles.

Answer 1

Find the value of equal angles

Let the equal angles be $x$.

Given that, one of the angle $=100°$

By the angle sum property, sum of all angles of a triangle is $180°$.

Therefore,

$$\begin{gathered} x+x+100°=180° \\ 2x+100°=180° \\ 2x=180°-100° \\ 2x=80° \\ x=\frac{80°}{2}=40° \end{gathered}$$

Hence, the equal angles are $40°$ each