Exact Area and Circumference of Circles

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Exact Area and Circumference of Circles

• Section 10.2a

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Warm Up

• Find the area and circumference of each circle.
  Round the nearest hundredth.
• r 4in
• d 16 in

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• Find the exact area and circumference of each
  circle.
• r 2in
• d 10 in

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Equation of a Circle

• Find the exact area of each circle
• (x4)2 (y-2)2 169
• (x2)2 (y 1)2 30
• (x-4)2 (y2)2 24

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• Find the exact circumference of the circle if
• A 49 p ft2
• A 20 p in2
• A 25 m2
• A 5 m2

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Find the exact area of the circle if a. C 12
p in b. C 17 p in c. C 24 in d. C 9
in
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Find the exact area of each shaded region
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