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Algebra
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OpenStudy (anonymous):
can anyone help me with my math
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OpenStudy (anonymous):
Please specify the question.
OpenStudy (anonymous):
the area of a right triangle is 81 square meters the hight is twice the base what is the base
OpenStudy (anonymous):
billbell can you help
OpenStudy (anonymous):
Can you tell me the formula for the area of a triangle?
OpenStudy (anonymous):
a=1/2BH
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OpenStudy (anonymous):
Good. In this question what equation would represent the relationship between the base, B, and the height, H?
OpenStudy (anonymous):
multiplication?
OpenStudy (anonymous):
What does it tell you about the two in the question, in words?
OpenStudy (anonymous):
ohh the height is twice the base
OpenStudy (anonymous):
How can you write that as an equation?
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OpenStudy (anonymous):
2b
OpenStudy (anonymous):
=?
OpenStudy (anonymous):
What is 2B equal to (from the question)?
OpenStudy (anonymous):
2b=81*1/2b
OpenStudy (anonymous):
No. What the question says is simple. 2B = H. The height is twice the base. (Try not to think so hard!)
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OpenStudy (anonymous):
Take the facts one at a time.
OpenStudy (anonymous):
You're ok with that?
OpenStudy (anonymous):
ohh thanks
OpenStudy (anonymous):
We now know H = 2B and we also know that A=81. We had A = BH / 2.
Therefore we can write 81 = B(2B) / 2 or B^2 = 81
Therefore B=9 and we're finished.
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