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.
