Question

In right angled triangle, $\angle A$ is right angle and $\angle B={35}^o$, then $\angle C$ is .................

• A. ${65}^o$
• B. ${55}^o$
• C. ${75}^o$
• D. ${45}^o$

Answer 1

The correct option is B ${55}^o$

Let the right angled triangle by $△ABC$,

Then $\angle A={90}^o$ , $\angle B={35}^o$ [Given]

$\angle A+\angle B+\angle C={180}^o$ [Sum of all the angles of the triangle is ${180}^o$]

$\Rightarrow {90}^o+{35}^o+\angle C={180}^o$

$\Rightarrow \angle C={180}^o-{125}^o={55}^o$