Question

I just need to know the steps on how to solve this: If the area of a trapezoid is 40 cm squared, the height is 4 cm and the bottom base is 12 cm, what is the length of the top base?

Answer 1

Area of trapezoid

\[\Large A = h*\frac{b_1+b_2}{2}\]

Answer 2

b1 and b2 are the parallel bases
h is the height

Answer 3

My online teacher never taught me to divide the bases by 2

Answer 4

how about multiplying the sum by 0.5?

Answer 5

maybe your teacher gave you something like this?

\[\Large A = h*0.5*(b_1+b_2)\]

Answer 6

My classes are online so I never interact with him. He just gives us questions and videos to watch but the videos don't really explain it. But i would just plug in what I already know right?

Answer 7

yes `If the area of a trapezoid is 40 cm squared, the height is 4 cm and the bottom base is 12 cm`

A = 40
h = 4
b1 = x
b2 = 12

Answer 8

40=4* b1+12/2 ??

Answer 9

\[\Large A = h*\frac{b_1+b_2}{2}\]
\[\Large 40 = 4*\frac{x+12}{2}\]
\[\Large 40 = 4*\frac{1}{2}*(x+12)\]
\[\Large 40 = 2*(x+12)\]
\[\Large 40 = 2x+24\]
solve for x

Answer 10

x=8

Answer 11

correct

Answer 12

That was easier than I thought. I understood it more thank you

Answer 13

no problem