Question

If one of the angles of a triangle are ${47}^o$ and ${83}^o$. What is the measure of the third angle?

Answer 1

By angle sum property, Sum of all angles $={180}^{\circ }$

Given:Two angles of a triangle$={47}^{\circ }$ and ${83}^{\circ }$

Sum of these two angles$={47}^{\circ }+{83}^{\circ }={130‬}^{\circ }$

$\Rightarrow$ third angle$={180}^{\circ }-$sum of the two angles

$\Rightarrow$ third angle$={180}^{\circ }-{130‬}^{\circ }={50}^{\circ }$

$\therefore$ the third angle is ${50}^{\circ }$