Question

In a right triangle, if one angle is ${50}^{\circ }$, find its third angle.

• A. ${50}^{\circ }$
• B. ${40}^{\circ }$
• C. ${90}^{\circ }$
• D. ${30}^{\circ }$

Answer 1

The correct option is B ${40}^{\circ }$

In a right triangle one angle is a right angle.

Given, Other angle = ${50}^{\circ }$

Therefore,
Third angle = ${180}^{\circ }-({90}^{\circ }+{50}^{\circ })$

$={180}^{\circ }$ - ${140}^{\circ }$

$={40}^{\circ }$