Answer:
Lengths of the sides = 7 cm.
Step-by-step explanation:
An equilateral triangle is a triangle in which all three sides are equal.
If the side length of the equilateral triangle = x
The perimeter of the equilateral triangle = 3x
Given:
A garden is in the shape of an equilateral triangle and its perimeter = 21 cm
So, each side length of the garden = 21/3 = 7 cm.
