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OpenStudy (anonymous):
If you draw all of the diagonals from a single vertex of a convex polygon with 8 sides, how many triangles are formed?
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OpenStudy (anonymous):
Welcome to OpenStudy. Try it. Draw a STOP sign (octagon). Draw all the diagonals from one vertex. Count the triangles. What do you get?
OpenStudy (anonymous):
Not a very good drawing, but something like this: |dw:1437081929677:dw|
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