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Mathematics 15 Online
OpenStudy (anonymous):

Given the ordered points of a polygon in 3d space, how would you decide if it's concave vs convex? Is it something with the dot product or cross product? Thanks!

OpenStudy (anonymous):

think i got it - take the cross product of each vertex in order. now take the magnitude of the resulting vector. if the magnitude is < 0, its concave.

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