Question

Question #cebc7

Answer 1

`10cm`.

Explanation:

An equilateral triangle is one with all three sides of equal length.

The perimeter of a triangle is the sum of all the three sides.

For an equilateral triangle whose side is `x`, the perimeter will be:

`P=3x`

Since we know that `P=30`,

`30=3x`

Divide both sides by `3`.

`30/3=(3x)/3`

`(10cancel30)/(1cancel3)=(cancel3x)/cancel3`

`10=x`

Hence, the length of the side of the equilateral triangle is `10cm`.