anonymous
  • anonymous
would this be right??
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
9*9*4
1 Attachment
anonymous
  • anonymous
(9*4)9
anonymous
  • anonymous
finding volume

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anonymous
  • anonymous
no, that's not right.
anonymous
  • anonymous
\[(1 / 2)9\times9\times4\]
anonymous
  • anonymous
is the triangle an equilateral triangle, a right angle triangle or an isosceles triangle?
anonymous
  • anonymous
would the area be \[(1 / 2)81\left( 4 \right)=162 \]
anonymous
  • anonymous
how did you arrive at (1/2)*9*9? How do you know the height of the triangle is 9?
anonymous
  • anonymous
the bottom part has a 9 and has a tick mark so all three sides are equal and 4 in the height
anonymous
  • anonymous
still, the height is not 9, only the sides are 9.
anonymous
  • anonymous
you have to calculate the height of the triangle and plug it in the formula 1/2 base*height. base is 9.
anonymous
  • anonymous
9 is the base
anonymous
  • anonymous
right. calculate height using Pythagoras theorem
anonymous
  • anonymous
V=Bh= (1/2*9*9)(4)= (40.5)(4)=162
anonymous
  • anonymous
I am talking about the height of the triangle. for an equilateral triangle of side 9, how do you calculate its area?
anonymous
  • anonymous
draw an equilateral triangle on a piece of paper. how do you calculate its height?
anonymous
  • anonymous
a^2+b^2=C^2
anonymous
  • anonymous
ok good, what is a, b and c in an equilateral triangle?
anonymous
  • anonymous
a=9 b=9 c=162
anonymous
  • anonymous
no, that is not right. http://math.about.com/od/formulas/ss/areaperimeter.htm In that picture, the area of the triangle is 1/2b*h. so, what do you know about an equilateral triangle that will make finding the height easier?
anonymous
  • anonymous
the height in my picture is 4
anonymous
  • anonymous
no, that is not the height of the triangle, it is the height of the prism. I am talking about the height of the triangle. The volume of the prism is the area of the triangle times the height of the prism, correct? so you know the height of the prism. Now you need to find the area of the triangle. So, in order to do that you need to find the height of the triangle, so that you can put it in the formula 1/2b*h.

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