Question

How many right angles does a right triangle have?

Answer 1

A right triangle has only one right angle.

Explanation:

Since the sum of all angles in any triangle is equal to `180^o`, so there can be only one right angle if all other angles are to be greater than zero.

Let's assume that there are two right angles

The sum would be:

`s=90+90+C`

So the angle C would have to be zero, which is impossible.