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Areas of Regions of Circles

Areas of Regions of Circles. State standard 21.0 - Students prove and solve problems regarding relationships among chords secants tangents inscribed angles and inscribed angles, and inscribed and circumscribed polygon and circles. by Andrew ,Colin, and Ryan. Theorem 11.9 Area of a Circle.

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Areas of Regions of Circles

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  1. Areas of Regions of Circles State standard 21.0 - Students prove and solve problems regarding relationships among chords secants tangents inscribed angles and inscribed angles, and inscribed and circumscribed polygon and circles. by Andrew ,Colin, and Ryan

  2. Theorem 11.9 Area of a Circle The area of a circle is 3.14 times the square of the radius Example: A=3.14(6)squared 6 3.14x36=113.04 A=113.04

  3. Theorem 11.10 Area of a sector The ratio of the area, A, a sector to the area of its circle is equal to the ratio of the measure of the intercepted arc to 360 degrees. Example: C A= 70° -:- 360° x Pi. Radius sq. 70° -:- 360° = 0.194 5 cm 70° P Radius=5 D 0.194 x 5 pi. sq. = 15.3 cm.sq. Answer: A = 15.3 cm. sq.

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