Question

Equilateral triangle, isosceles but not equilateral triangle, scalene triangle, not a triangle.

Answer 1

Answer:

equilateral triangle is an isosceles as an triangle to be an isosceles it need of 2 sides are equal that we have on equi. triangle

but to be a scalene triangle no one side be equal so its properties does not match with equi. triangle i.e. all sides are equal

Answer 2

$equilateral \: triangle$

A traingle with 3 equal sides known as equilateral triangle.

$isosceles \: triangle$

A triangle with 2 equal sides.

$scalene \: triangle$

A triangle with no equal side.