Question

An equilateral triangle has a side length of 16 cm work out the area of the triangle.

Give your answer rounded to 1 DP.

Answer 1

110.9 cm²

Explanation:

The area (A) of an equilateral triangle is calculated as

A =
`(s^2√(3) )/(4)` ( s is the side length )

Here s = 16, thus

A =
`(16^2√(3) )/(4)`

=
`(256√(3) )/(4)` = 64
`√(3)` ≈ 110.9 cm² ( to 1 dec. place )