Total Surface Area??????? :confused:

[R0BD0G]

used: used: used: used: used: used: used: used: used: :gren:

total surface area of a rectangle...how do i work that out.... :

[mk2maniac]

Length x Width

[R0BD0G]

is it multiplied by 2??

[mk2maniac]

No if you are figuring out the surface area of a rectangle it's length x width. If your working out the volume of an object, a cuboid for example, then it's length x width x depth. If you are working out the surface area of a triangel then it's half the base x height, or just divide by 2 at the end.

[phantomxr6t]

No! say you have a rectangle 2 metres x 3 metres that gives you 6 metres square of surface area.

[R0BD0G]

and i screwed up again...tsa of rectangular prism

[the_scotsman]

TSA of a rectangular prism:

Taken from one of 1 million results from Google:

A rectangular prism has six faces. Its surface area equals the total area of those six faces. To see how to find the surface area of a rectangular prism, unfold one as shown below.



Since each face is a rectangle, you can find the surface area of a rectangular prism by using the formula A = lw six times. For the figure above, surface area = (10)(5) + (10)(2) + (10)(5) + (10)(2) + (5)(2) + (5)(2) = 160.

[XR Martin]

No matter

[R0BD0G]

thank u all
Robbo

[S3SR]

if its a prism (a 3D shape) its just the total surface area of each side

so rectangular prism

usually 90% of time is square based sometimes retangular and is always gonna be 4 sides the same and 2 sides the same

anyways if square calculate one square then times by 2 ie 2 squares on the ends
then do same for rectangles and times by 4 then add surface area.

hope that helps

[thefargo]

(2 x length x depth) + (2 x length x height) + (2 x depth x height)

[Cameronhayward]

Surface Area = Length X Width X Height

[Pedro]

To work out the area of a prizm, multiply the number of cells x the quadrangle and divide by the height of the walls + the length of the razor wire.
If you're correct, you get out of jail free.

[Dezza]

Originally Posted by Cameronhayward

Surface Area = Length X Width X Height

Actually, you will find that gives you the volume, not the area.

FALCONSR is right on the money though.

[Serial_Fool]

Wait 'till you get to algebra :

[GXL078]

:
Assuming its a regular rectangular prism:
Total Surface area (S.A) = S.A of four rectangular faces + S.A. of 2 square ends
4 x (length x height) + 2 x (depth x height)

Next question. Something harder than year 5 maths please

[bathurst77]

Treat it as 2 sets of 3 rectangles.
Work out area of each, add together.

[GXL078]

Originally Posted by bathurst77

Treat it as 2 sets of 3 rectangles.
Work out area of each, add together.

Huh? How about THREE sets of TWO rectangles? As in THREE pairs of OPPOSITE sides!

[knighto42]

Originally Posted by xcgxl

Huh? How about THREE sets of TWO rectangles? As in THREE pairs of OPPOSITE sides!

Or 2 identical sets of 3 different rectangles (ie. 2 each of rectangle A, B and C). You say tomato he says tomato.

[XR6_661]

Originally Posted by Serial_Fool

Wait 'till you get to algebra :

What till he gets to a square based pyramid :P

[Riksta]

Wait til you have to do circles, and pi comes into play!

<3 pi.

[BAturb]

get autoCAD, draw your shape and hit the 'find area' button, its never wrong

[bathurst77]

Originally Posted by xcgxl

Huh? How about THREE sets of TWO rectangles? As in THREE pairs of OPPOSITE sides!

Thats what i am saying. two lots of (=sets) three different rectangles (base, short side, long side) same thing different words. now settle down

[boss-290]

Originally Posted by Kermit 73

used: used: used: used: used: used: used: used: used: :gren:

total surface area of a rectangle...how do i work that out.... :

It pays to pay attention in math class. :

[outback_ute]

Originally Posted by knighto42

You say tomato he says tomato.

Doesn't really work in written form does it?? :

[GXL078]

Originally Posted by knighto42

Or 2 identical sets of 3 different rectangles (ie. 2 each of rectangle A, B and C). You say tomato he says tomato.

Ok, I get it now, I think?