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Use your findings from problem 8-79 to answer the questions below. Recall that the diameter of a circle is a segment with endpoints on the circle that passes through the center. The length of the segment is also called the diameter.

Use your findings from problem 879 to answer the questions below Recall that the diameter of a circle is a segment with endpoints on the circle that passes thro class=

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Answer:

See below ↓↓↓↓

Step-by-step explanation:

a) Area of circle with radius 10 units

  • A = πr²
  • A = 3.14 x (10)²
  • A = 3.14 x 100
  • A = 314 sq. units

b) Circumference of circle with diameter 7 units

  • r = d/2 = 7/2 units
  • C = 2πr
  • C = 2 x 22/7 x 7/2
  • C = 2 x 11 = 22 units

c) Diameter of circle with area 121π square units

  • A = πr²
  • 121π = πr²
  • r² = 121
  • r = √121 = 11 units
  • d = 2r = 2 x 11 = 22 units

d) Area of circle with circumference 20π units

  • C = 2πr
  • 20π = 2πr
  • r = 10 units
  • A = πr²
  • A = 3.14 x (10)²
  • A = 3.14 x 100
  • A = 314 square units

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