Question

How can you use the isosceles triangle theorem to prove that all equalateral triangles are also equiangular?

Answer 1

Isocolese triangles have 2 sides of equal length
the angles oposite are also equal measure

so therefor if a side is equal in length to another side, the angle oposite that side will also be equal

in an equilateral triangle, all sides are equal, so all angles oposite thos sides are equal
and therfor all the angles are equal
equiangular means all angles are equal