How many lines of symmetry does an isosceles triangle have?

A triangle with two sides of equal length is an isosceles triangle

Answer: An isosceles triangle has 1 line of symmetry.

The triangle also has 2 equal interior sides.

Explanation:

A triangle is only said to be an isosceles triangle if it has 2 equal sides. Therefore, every isosceles triangle by definition has 1 line of symmetry. It can be drawn by joining the vertex between equal sides and the midpoint of the opposite side.

Hence, an isosceles triangle has 1 line of symmetry.