Question

Two angles of a triangle are 55 and 55 it has two sides of equal length which could it be?

A: Acute isosceles

B: right scalene

C: acute scalene

D: obtuse isosceles

Answer 1

The answer is a because the last angle will be 70 since it is an isosceles which means that all the angles are acute therefore the answer is acute isosceles

Answer 2

A.

Explanation:

The third angle is 180 - 2*55 = 70 degrees.

So with 2 sides and 2 angles equal it is an acute isosceles triangle.