Question

In triangle ABC, m∠A = 55° and m∠B = 35°. Classify the triangle by its angles.

Answer 1

right triangle

Explanation:

is it

Answer 2

Is a right triangle

Explanation:

step 1

Find the measure of angle C

Remember that

The sum of the internal angles of a triangle must be equal to 180 degrees

so

`m<A+m<B+m<C=180\°`

substitute the given values

`55\°+35\°+m<C=180\°`

`m<C=180\°-90\°=90\°`

therefore

The triangle is a right triangle, because has a internal angle of 90 degrees