Question

A triangle has 2 angles that each measure 80°.

What kind of triangle is it?

Answer 1

1) The triangle that has 2 equal angles names isosceles.

2) Sum of angles in triangle = 180⁰.
80+80+x=180
160+x=180
x=20,
so
this triangles has 20, 80,80 angles. All of this angles are acute.
So we can say, the triangle is acute.

We can say, this triangles is acute and isosceles. 

Answer 2

two angles of equal measure is an isosceles triangle.