Area List

the volume of an ellipsoid is: 4 π a b c / 3.
♣♦

We know that for a triangle in 2d, area =
| 0.5 0.5 0.5 |
| x_1 x_2 x_3 |
| y_1 y_2 y_3 |
Is there a similar formula for triangles in space, with points given as (x,y,z) coordinates?
The 2d determinant formula generalizes in 3d to a determinant formula for the volume of a tetrahedron. [...]

I am in grade 7 and i was wondering what the formula for surface area of a triangular prism. thx ( and please explain it easily )
A triangular prism is a 3-dimentional object with 2 triangular bases and three rectangles connecting the bases.
Find the area of the triangle A = bh/2, but there [...]

Knowing the formula for the area of a rectangle, how could I show why the formula for the area of a parallelogram is A= b*h?
by the way I am 13 so try not to use complicated language! thanx
Cut a triangle off of the parallelogram… so that the parallelogram becomes a right trapezoid and the [...]

I don’t want u to explain to me how to do it. But please just give me the FORMULA of the surface area of a rectangular prism. Please (:
And the volume formula please.
The volume of a pyramid:
V(volume) = 1/3 * Area of the base * Height
The surface area of a pyramid:
SA(surface area) = [1/2 * [...]

i believe it is a triangular pyramid. all sides and the base are triangles so if it something else, please tell me.
Just find the area of all of the triangles, then add it up

Hey i need to know how to do the formula to get the area of a pyramid
http://en.wikipedia.org/wiki/Pyramid_(geometry)

By this I mean,
Let’s say its a RETANGULAR PRISM…do I take the surface area and multiply it by 6?
OR
is there another formula for it?
Width * Height * 2 + Width * Length * 2 + Height * Length * 2

You cannot use the surface area formula for a right cone to find the surface area of an oblique cone.
A. True
B. False
B FALSE , because A=INT ( 2pi F(x) DS ) DS is the length of the real curve .- Thus,
DS = sqrt( (F(x+dx) -F(x))^2 + dx^2 )
DS= dx sqrt [...]

This sounds like you just want the area of the hemisphere.
area of a sphere is A = 4πr²
so half that is A = 2πr²
If you want the cylinder also, area of a cylinder, just the side, is
A = 2πrh
And if there are two hemisphere, the other one is the same [...]