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You are not logged in. #1 20121021 23:44:53
GeometryRegular polygon's area can be calculated,other polygon's area can also be calculated using graph coordinates,but i have heard that polygon's area can be calculated using sides and external angles is it true?if it is what is the method? #2 20121022 00:42:54
Re: GeometryHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #3 20121022 00:59:48
Re: GeometryNo,i have heard that there is a formula for irregular polygon's area too(using side lengths and exterior angles #4 20121022 01:13:20
Re: GeometryIn mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #5 20121022 01:19:18
Re: GeometryIf you know what the polygon looks like, you can just split it up into triangles and use Heron's formula. If you have the right angles you can then apply things like the sine rule, cosine rule, etc. to find all the sides of the triangles you have split the polygon into. #6 20121022 01:33:05
Re: GeometryThe second link's 3rd method was the one I was looking for ,thank you. #7 20121022 01:34:25
Re: GeometryWow, that third method is really useful. And you really do only need the side lengths and angles! #9 20121022 02:34:12
Re: Geometryhi Ronald, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei 