SOLUTION: A triangle has an area of 72in squared. It has a height of 9 inches, what is the base?

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Question 99803: A triangle has an area of 72in squared. It has a height of 9 inches, what is the base?
Answer by doukungfoo(195) About Me  (Show Source):
You can put this solution on YOUR website!
ok the area of a triangle is equal to 1/2 times base times height
A=%281%2F2%29%28b%29%28h%29
or
A=%28bh%29%2F2
Given: area is 72 in squared
Given: height is 9 inches
Now plug in the given information and solve for base
A=%28bh%29%2F2
72=%289b%29%2F2
multiply both sides of the equal sign by 2
%2872%29%282%29=%28%289b%29%2F2%29%282%29
144=9b
now divide both sides of the eual sign by 9
144%2F9=%289b%29%2F9
16=b
So the base is 16 inches
Check answer using the original equation
A=%28bh%29%2F2
72=%28%2816%29%289%29%29%2F2
72=%28144%29%2F2
72=72