Question

In the right triangle ABC, angle C equals 90 degrees, if angle B is 63 degrees, what is the measure of angle A?

Answer 1

The angle A is `27°`.

Explanation:

One property of the triangles is that the sum of all the angles will always be `180°`.
In this triangle, one angle is `90°` and an other is `63°`, then the last one will be:

`180-90-63=27°`

Note: in a right triangle, the right agnle is always 90°, so we also say that the sum of the two not-right angles is 90°, because 90+90=180.