Question

An equilateral triangle has sides of length 10 cm.

**DIAGRAM IN PICTURE**

a. Calculate the perpendicular height, h, of the triangle.

b. Calculate the area of the triangle.

Give your answers correct to one decimal place. 10 cm 10 cm 10 cm

Answer 1

A is 8.7cm
B is 43.5 cm

Answer 2

a. 8.7cm

b. 43.5cm squared

Explanation:

a. draw the triangle with a side length of 10cm, and measure the height which is 8.7cm.

b. formula to find the area of a triangle: (base into height) divided by 2 ((b x h) / 2)

the base is 10

the height is 8.7

(10 x 8.7)/2 = 87/2 = 43.5 cm squared