Question

Calculate the area of the equilateral triangle below. Give your answer in cm2 to 2 d.p.

Answer 1

Answer: 31.28

Explanation:

The height of the triangle can be worked out using pythagoras

h =
`\sqrt[2]{8.6^(2)-4.3^(2) } = √(55.47)`

The area is height x base / 2

8.4 x
`√(55.47)` / 2 = 31.28 to 2 d.p.