## anonymous 5 years ago Ok I have a big TEST today and I need to make sure I know how to do this can someone help me remember cause I forget when Im nerveus

1. anonymous

Ok what is it

2. anonymous

Ok thx ok 1st thing how to find the volume of a cylinder??

3. anonymous

V=r times 2 x height cubed

4. anonymous

ok good i remember that the 2nd thing is how to find the missing length to a triangle

Don't Pi go into that formula?

6. anonymous

no

7. anonymous

Wait oh I looked at my very old hw i found and it has that formula its rx2xpixheight

8. anonymous

Ah. I was taught differently then...

9. anonymous

oh ok

Volume of a cylinder: $V=\pi r ^{2}h$ where r= radius, h=height, and we all know what pi is

11. anonymous

ya cool that makes sense

mimi373, just look at it as finding the area of the circular base then multiplying by the height.

13. anonymous

ok i understand cool

What was the question regarding the triangle. I might could help you with that.

15. anonymous

how to find the missing length to a triangle

16. anonymous

how to find the missing length to a triangle

What is given in the problem? Is it a special triangle like a right triangle or a iscolese or equilateral?

18. anonymous

umright triangle i think

A right triangle has one of the angles = to 90 degrees, thus the term "right" triangle. The side opposite side from this right angle is the longest side and is called the hypotenuse. The following is the rule for the hypotenuse with reference to the other two sides. The hypotenuse squared is equal to the sum of the squared remaining two legs. Lets call the hypotenuse c, and the other legs, a and b then:$a ^{2}+b ^{2}=c ^{2}$

Thats about all I can say about, you know the angles add up to 180 degrees.