I'm doing a project in geometry and I don't know where I can find the surface area formula for these shapes http://www.mathsisfun.com/shape.html if anyone knows a website or something with the surface area formula can you please tell me, this thing is due tommorow and I forgot about it, karma for anyone who can help.
easy : (lenght of a side x lenght of the imaginary line that is perpendicular to the segment and link to the center of the shape)/2 x number of sides
edit : this works for all the regular polygons. This pic will help you :
edit : this works for all the regular polygons. This pic will help you :
Last edited by -=raska=- (2007-02-07 17:22:41)
E=mc2 .......... am i close?
I typed in "geometry equations shapes area" in google and found a load of sites.... here's one.
http://www.equationsheet.com/sheets/Equations-4/0.html
http://www.equationsheet.com/sheets/Equations-4/0.html
My eyes are bleeding so I cant search but im 100 precent sure you can find it on wilipedia. Just look for spacific shape that you need.
http://en.wikipedia.org/wiki/Triangle
http://en.wikipedia.org/wiki/Sphere
etc
http://en.wikipedia.org/wiki/Triangle
http://en.wikipedia.org/wiki/Sphere
etc
Will this help?
http://math.about.com/library/blmeasurement.htm
http://math2.org/math/geometry/areasvols.htm
I hate math, I got a test tomorrow. Goodluck
http://math.about.com/library/blmeasurement.htm
http://math2.org/math/geometry/areasvols.htm
I hate math, I got a test tomorrow. Goodluck
http://argyll.epsb.ca/jreed/math9/strand3/formulae.htm
google search for: surface area "regular polygon"
google search for: surface area "regular polygon"
yea, that sort of helps, I'm doing from pentagons to dodecagons, I'm still a little confused how that formula in the picture works, could you maybe explain it a little more please.-=raska=- wrote:
easy : (lenght of a side x lenght of the imaginary line that is perpendicular to the segment and link to the center of the shape)/2 x number of sides
edit : this works for all the regular polygons. This pic will help you :
http://i128.photobucket.com/albums/p184 … r/area.png
1. Google is your friend.
2. Do your own goddamn homework.
3. I failed Maths, don't ask me.
2. Do your own goddamn homework.
3. I failed Maths, don't ask me.
ok just imagine that your regular polygon is a group of triangles... for example, lets say you want to find the surface area of a dodecagon. Then you divide the shape in 12 triangles as I did in my picture. Now you only have to find the surface area of one of the triangles, and because they are identical, multiply them by the number of triangles. The surface area formula of a triangle is (its base x its height)/2. On my pic, the base is one of the side and the height is the segment between the center of the shape to one of the side (perpendicularly).thareaper254 wrote:
yea, that sort of helps, I'm doing from pentagons to dodecagons, I'm still a little confused how that formula in the picture works, could you maybe explain it a little more please.-=raska=- wrote:
easy : (lenght of a side x lenght of the imaginary line that is perpendicular to the segment and link to the center of the shape)/2 x number of sides
edit : this works for all the regular polygons. This pic will help you :
http://i128.photobucket.com/albums/p184 … r/area.png
so : (lenght of a side x lenght of the imaginary line that is perpendicular to the side and that links to the center of the shape)/2 x number of sides
Play less battlefield---->thereby allowing you to sleep---->so you can stay awake in math class
thanks man, you helped me out alot, unlike these other douchebags that are spamming, thanks!-=raska=- wrote:
ok just imagine that your regular polygon is a group of triangles... for example, lets say you want to find the surface area of a dodecagon. Then you divide the shape in 12 triangles as I did in my picture. Now you only have to find the surface area of one of the triangles, and because they are identical, multiply them by the number of triangles. The surface area formula of a triangle is (its base x its height)/2. On my pic, the base is one of the side and the height is the segment between the center of the shape to one of the side (perpendicularly).thareaper254 wrote:
yea, that sort of helps, I'm doing from pentagons to dodecagons, I'm still a little confused how that formula in the picture works, could you maybe explain it a little more please.-=raska=- wrote:
easy : (lenght of a side x lenght of the imaginary line that is perpendicular to the segment and link to the center of the shape)/2 x number of sides
edit : this works for all the regular polygons. This pic will help you :
http://i128.photobucket.com/albums/p184 … r/area.png
so : (lenght of a side x lenght of the imaginary line that is perpendicular to the side and that links to the center of the shape)/2 x number of sides
I see three spam posts... tops. Last time I try helping you with anything...thareaper254 wrote:
thanks man, you helped me out alot, unlike these other douchebags that are spamming, thanks!
(apothem x perimeter) / 2
for any regular polygon
for any regular polygon
i don't do fucking geometry
i do simple calculuS and advanced algebra
i do simple calculuS and advanced algebra
i know the first 100 decimal places of pi. that might come in handy. PM me if you need them.
you may know the first 100, but the internet and I know the first million digits of pi!CoronadoSEAL wrote:
i know the first 100 decimal places of pi. that might come in handy. PM me if you need them.
[Jealousy]tF-voodoochild wrote:
you may know the first 100, but the internet and I know the first million digits of pi!CoronadoSEAL wrote:
i know the first 100 decimal places of pi. that might come in handy. PM me if you need them.
I am now scared of what is coming this year in maths
logically, math is the easiest subject. they tell you the type of problems (with slight variation) and they tell you the solutions. all you have to do is regurgitate.gene_pool wrote:
I am now scared of what is coming this year in maths
in other subjects the material is not as straight-forward.
but...the little numbers....and the big ones...CoronadoSEAL wrote:
logically, math is the easiest subject. they tell you the type of problems (with slight variation) and they tell you the solutions. all you have to do is regurgitate.gene_pool wrote:
I am now scared of what is coming this year in maths
in other subjects the material is not as straight-forward.
Im having trouble with the laws of indicis as it is
oo i know, I mean the people before that post that he made. I didn't mean the beginning posts.tF-voodoochild wrote:
I see three spam posts... tops. Last time I try helping you with anything...thareaper254 wrote:
thanks man, you helped me out alot, unlike these other douchebags that are spamming, thanks!
you lost me at maths...
If you don't know the length of the vertical of each triangle, use trig to work it out.
See I win more, as I've just worked out the million and first digit of pi.tF-voodoochild wrote:
you may know the first 100, but the internet and I know the first million digits of pi!CoronadoSEAL wrote:
i know the first 100 decimal places of pi. that might come in handy. PM me if you need them.
God damn I hate the 25th reply
Last edited by Towelly (2007-02-08 03:18:21)