would this be right??

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- anonymous

would this be right??

- jamiebookeater

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- anonymous

9*9*4

##### 1 Attachment

- anonymous

(9*4)9

- anonymous

finding volume

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## More answers

- anonymous

no, that's not right.

- anonymous

\[(1 / 2)9\times9\times4\]

- anonymous

is the triangle an equilateral triangle, a right angle triangle or an isosceles triangle?

- anonymous

would the area be \[(1 / 2)81\left( 4 \right)=162 \]

- anonymous

how did you arrive at (1/2)*9*9? How do you know the height of the triangle is 9?

- anonymous

the bottom part has a 9 and has a tick mark so all three sides are equal and 4 in the height

- anonymous

still, the height is not 9, only the sides are 9.

- anonymous

you have to calculate the height of the triangle and plug it in the formula 1/2 base*height. base is 9.

- anonymous

9 is the base

- anonymous

right. calculate height using Pythagoras theorem

- anonymous

V=Bh= (1/2*9*9)(4)= (40.5)(4)=162

- anonymous

I am talking about the height of the triangle. for an equilateral triangle of side 9, how do you calculate its area?

- anonymous

draw an equilateral triangle on a piece of paper. how do you calculate its height?

- anonymous

a^2+b^2=C^2

- anonymous

ok good, what is a, b and c in an equilateral triangle?

- anonymous

a=9 b=9 c=162

- 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

the height in my picture is 4

- 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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