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Mathematics 12 Online
OpenStudy (anonymous):

Examine the figure below. Which of the following best describes this polygon? concave octagon concave decagon convex octagon convex decagon

OpenStudy (anonymous):

OpenStudy (anonymous):

octagon/decagon just refers to the number of sides. oct = 8 dec = 10

OpenStudy (anonymous):

A concave figure has one angle that is greater than 180 degrees. It looks like it's caving in on itself, like this: |dw:1337047001354:dw|

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