Question

how many lines of symmetry are there on an equilateral triangle?

Explanation:

Step1: Recall line - symmetry definition

A line of symmetry divides a shape into two congruent parts.

Step2: Analyze equilateral triangle

An equilateral triangle has three equal sides and three equal angles of 60°. We can draw a line from each vertex to the mid - point of the opposite side. These lines divide the triangle into two congruent halves.

Answer:

3