Question

Giving Medal And Fan~
Jorge plans to paint a bedroom wall that is shaped like a trapezoid. The bottom edge of the wall is 22.5 feet long, and the top edge of the wall is 9.5 feet long. If the wall is 8 feet tall, what is the area of the wall?
A) 256 ft

B) 38 ft

C) 90 ft

D) 128 ft

Answer 1

The general formula for the area of a trapezoid is\[\frac{ a+b }{ 2 }h\]
where a and b are the (different) edge lengths and h is the height. (This assumes that the trapezoid is horizontal, which seems to be the case here.)

Please use this formula to find the area of this particular trapezoid.

Answer 2

Thanks~ @mathmale

Answer 3

My great pleasure!

Answer 4

@mathmale
Isn't "a" area?

Answer 5

I should have labeled the formula I provided:

A is area:

\[A=\frac{ a+b }{ 2 }h\]

where a and b are the two (different) side lengths and h is the (uniform) height or width of the trapezoid. Note that here a=22.5 ft., b=9.5 ft., and h=8 ft.

Answer 6

oh okay thanks! That makes it a lot more clear!!

Answer 7

Good going!