Angles in equilateral triangles The three angles in an equilateral triangle are equal and they add up to 180 ∘. To find the size of each of these angles divide 180 by 3. 180 ÷ 3 = 60 ∘ ...

An isosceles triangle will have two angles the same size. In an equilateral triangle, all angles will be 60°. A right-angled triangle will have one angle that is 90°, which means the other two ...