Question

The formula for the area of a triangle is . What is the length of the base, b, of a triangle with an area, A, of 110 m2 and a height, h, of 10 m?

1100 m

22 m

2200 m

11 m

Answer 1

b = 22 m

Explanation:

The formula for calculating the area (A) of a triangle is

A =
`(1)/(2)` bh

multiply both sides by 2 to eliminate the fraction

2A = bh ( divide both sides by h )

b =
`(2A)/(h)`, hence

b =
`(2(110))/(10)` =
`(220)/(10)` = 22 m