Question

An angle which measures 90${}^o$ is called

• A. obtuse
• B. acute
• C. right
• D. none of these

Answer 1

The correct option is C right

$\Rightarrow$ An acute angle is any angle smaller than ${90}^o$. Angle greater then ${90}^o$ is obtuse angle.

$\Rightarrow$ An angle which measures ${90}^o$ is called $right.$

$\Rightarrow$ The special symbol like a box in the corner That says it is a right angle. The ${90}^o$ is rarely written in. If we see the box in the corner, we are being told it is a right angle.

$\Rightarrow$ In diagram measure of $\angle ABC$ is ${90}^o$.

$\therefore$ $\angle ABC$ is right angle.