Question

A triangle has an area of 221.16 square inches.The height of the triangle is 29.1. What is the length of the back of the triangle?

Answer 1

The formula of the area of a triangle with the height h and the base b:

`A_\Delta=(bh)/(2)`
We have:

`A_\Delta=221.16\ in^2\\h=29.1\ in\\b=?`
Substitute:

`(29.1b)/(2)=221.16\\\\14.55b=221.16\ \ \ |:14.55\\\\b=15.2\ in`