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Area of regular polygons
Section 10.3
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Find the missing side using trigonometry.
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A regular polygon means that the polygon is convex and all sides AND angles are congruent.
Area of any regular polygon is: A = ∗P ∗a A = Area P = Perimeter a = apothem
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In an equilateral triangle, the apothem is NOT half of the altitude.
You can use either A = ½ P a or A = ½ b h
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Find the area of each regular polygon.
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Find the area of a regular octagon with perimeter of 72 in.
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Find the area of the regular pentagon with perimeter of 25 in.
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Find the area of a regular octagon with perimeter of 96 in.
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Find the area of the shaded region.
Pentagon and triangle are regular.
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Find the area of the shaded region.
A regular hexagon located in a square.
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The area of a regular octagon is 392
The area of a regular octagon is m2 an has an apothem length of 10.9m long. Find the length of each side. Find the perimeter of the octagon.
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Find the area of a square with apothem length of 5 cm.
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Find the area of the shaded region.
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