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10.3 Areas of Regular Polygons

10.3 Areas of Regular Polygons. The radius of a regular polygon is the distance from the center to a vertex. The apothem is the perpendicular distance from the center to a side. Finding Angle Measures.

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10.3 Areas of Regular Polygons

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  1. 10.3 Areas of Regular Polygons • The radius of a regular polygon is the distance from the center to a vertex. • The apothem is the perpendicular distance from the center to a side.

  2. Finding Angle Measures • The figure is a regular pentagon with radii and an apothem drawn. What is the measure of each numbered angle?

  3. Postulate 10.1 • If two figures are congruent, then their areas are equal.

  4. Theorem 10.6 • The area of a regular polygon is half the product of the apothem and the perimeter.

  5. Finding the Area of a Regular Polygon • What is the area of the regular decagon?

  6. More Practice!!!!! • Homework – Textbook p. 632 #8 – 25 ALL.

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