SOLUTION: The height of a triangle is 4m more than twice the length of the base. the area is 35m2. I know that A=1/2BH, but I just can't put it into an equation to work it.
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Question 31270: The height of a triangle is 4m more than twice the length of the base. the area is 35m2. I know that A=1/2BH, but I just can't put it into an equation to work it. Answer by troyapplehelen(46) (Show Source):
You can put this solution on YOUR website! 1. h=2b+4, and A=(1/2)b.h
=(1/2)b(2b+4)=35
A is (b^2)+(4b)=70
2(b^2) + 4b -70 =0
=b^2 +2b -35 =0
(b+7)(b-5) = 0 so, b is -7 or 5 but -7 is not exist in
length so we chose b=5 only.
then, ur area 35 = (1/2)5.14 works.
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