Question

Is an equilateral triangle a quadrilateral?

Answer 1

No.

Explanation:

All triangles have three sides and three angles, hence the root word "tri" which means "three".

All quadrilaterals have four sides and four angles, hence the root "quad" meaning "four".

A triangle will never be a quadrilateral, because they do not share traits. So no, an equilateral triangle is not a quadrilateral.