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OpenStudy (anonymous):
A regular octagon is inscribed in a circle with the radius of 5cm. Find the area of the octagon.
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OpenStudy (kira_yamato):
The octagon is made up of 8 equi ∆s. And the side of each equi ∆ is 5 cm (rad of circle). \[Area=8 \times \frac{1}{2} \times 5 \times 5 \times [\sin 60˚] = 50\sqrt{3}\]
OpenStudy (anonymous):
Will the triangles be drawn from one point on the octagon to the others? or each point to the middle
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