The area of a trapezoid is A=0.5(b1+b2)h
find b1 if A=100, h=5, and b2=12.
Please help.

Question

The area of a trapezoid is A=0.5(b1+b2)h
find b1 if A=100, h=5, and b2=12.
Please help.

directrix · Answer

A = 0.5 *  (b1 + b2 ) *h

find b1 if A=100, h=5, and b2=12.

directrix · Answer

100 = .5 * (b1 + 12) * 5

 100 = .5 * (b1 + 12) *5

 Multiply both sides by 2

 200 = 2* .5 * (b1 + 12) *5

200 = 1 * (b1 + 12)*5

200 = (b1 + 12) * 5

Divide both sides by 5

40 = b1 + 12

b1 = ?                           @annjewell1998

annjewell1998 · Answer

I have no idea. do i divide 40 by 5 and 1 by 5? i tried and it didn't look right.

directrix · Answer

You should read the entire thread and follow the steps rather than looking at the last post.

directrix · Answer

40 = b1 + 12

b1 = ?                           @annjewell1998 


What is 40 minus 12 = ?   That is b1.