Help on formulas: lateral area of cylinder, volume of prism,

[AutumnIsabel]

I need some help with math formulas... I have nearly forty and I can't figure out six of them. I'm mostly stuck on cylinders and Equilateral Triangles. If anyone could help me figure out at least SOME of them it would be greatly appreicated.

How do I:

1. Find the Lateral Face Area of a Cylinder.
2. Find The Total Face Area of a Cylinder.
3. Find the Total Surface Area of an Equilateral Triangular Prism.
4. Find the Volume of an Equilateral Triangular Prism.
5. Find the Volume of a regular Hexagonal Prism.
6. Find The Volume of a Cylinder.

All I need is formulas... I don't need examples but they wouldn't hurt. Thank you so much to whoever can help!

 

[jonboy]

I would try Google.

 

[soonerstaylo]

hello i am still learning this to but the formula for a cylinders volume is -

radius x radius x pie/3.14 x hight hope this helps

 

[galactus]

'pie'?. Come on. :roll:

All of these can be found in most any math text.

The surface area of a cylinder with top and bottom is given by \(\displaystyle 2{\pi}r^{2}+2{\pi}rh\)

Because we have two circular tops each of area \(\displaystyle {\pi}r^{2}\)

The body of the cylinder is the \(\displaystyle 2{\pi}rh\)

We can see this because when we roll it out, its length is the circumference of a circle, \(\displaystyle 2{\pi}r\), and it's width is h.

The volume of a cylinder is \(\displaystyle V={\pi}r^{2}h\)

 

[Deleted member 4993]

'pie'?. Come on. :roll:

Because we have two circular tops each of area \(\displaystyle {\pi}r^{2}\) .... Pie 'r not square ???? I think - Pie 'r round ...