the area of a trapezoid is 60 square feet, it's height is 6ft, and one base is 12ft. find the number of feet in the other base

Question

The formula for the area of a trapezoid is A equals 1/2h (b1 plus b2) express b1 in terms of a, h and b2

Answer 1

Hi Isaac,

 

Let's see A=60, h=6, a=12 b=?

 

A = 1/2(a+b)h   = 60=1/2(12+b)6

 

<=> 10=1/2(12+b)

 

<=> 20=12+b

 

=> b=8

 

hope this helps