Question

What is the length of the base of a triangle with height 18 m and area 99 square m?

Answer 1

use the area formula and solve for height.

Area of triangle = 1/2(b)(h)

99 = 1/2(b)(18)
99 = 9b
11 = b

Hope this helps :)

Answer 2

Use the equation for the area of a triangle:

`A = (1)/(2) hb`
where A = area, h = height of the triangle, and b = base of the triangle.

You know that h=18m and A=99
`m^(2)`. Plug those values into the equation and solve for b, the base.

`A = (1)/(2) hb \\ 99 = (1)/(2) (18)b \\ 99=9b\\ b=11`

The base is 11m long.