Question

Question 26

Fill in the blanks to make the statement true.

The number of right angles in a straight angle is ______ and that in a complete angle is ________.

Answer 1

We know that,

Right angle = ${90}^{\circ }$

Straight angle = ${180}^{\circ }$

and complete angle = ${360}^{\circ }$

$\therefore$ Number of right angles in a straight angle = $\frac{{180}^{\circ }}{{90}^{\circ }}$ = 2

Here, $\angle AOC$ and $\angle COB$ are right angles in a straight angle $\angle AOB$.

Number of right angles in a complete angle = $\frac{{360}^{\circ }}{{90}^{\circ }}$ = 4

In the above figure,$\angle AOC$,$\angle AOD$,$\angle COB$ and$\angle BOD$ are 4 right angles in the complete angle.