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11 Cards in this Set
- Front
- Back
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Theorem 74
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Every regular polygon is cyclic.
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Theorem 75
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The perimeter of a regular polygon having n sides is 2Nr, in which N = n sin 180/n and r is its radius.
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Theorem 76
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The area of a regular polygon having n sides is Mr squared, in which M = n sin 180/n cos 180/n and r is its radius.
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Theorem 77
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If the radius of a circle is r, its circumference is 2(pi)r.
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Corollary to Theorem 77
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If the diameter of a circle is d, its circumference is (pi)d.
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Theorem 78
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If the radius of a circle is r, its area is (pi)r squared.
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Apothem
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An apothem of a regular polygon is a perpendicular line segment from the center to one of its sides.
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Area of a circle
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The area of a circle is the limit of the areas of the inscribed regular polygons.
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Area of a sector
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See page 606
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Central angle of a regular polygon
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See page 574
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Circumference, Length of arc, Limit, (pi), Radius of a regular polygon, Regular polygon, Names of Regular polygons, and Sector
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See pages 572 to 612
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