Question

The perimeter of a quarter circle is 7.14 kilometres. What is the quarter circle's area? Use 3.14 for ​pi

Answer 1

Answer:

To find the perimeter of the quarter circle, find the circumference of the whole circle, divide by 4, and then add the radius twice. To find the radius when you are given the area of the quarter circle, multiply the given area by 4, then plug this number in for A into the formula A = pi * r^2 and then solve for r.

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Step-by-step explanation:

Answer 2

Answer:

16.22

Step-by-step explanation:

perimeter of a circle = 2πr

perimeter of quarter circle = 2πr/4 = πr/2

area of circle = πr²

area of quarter circle = πr²/4

perimeter = 7.14

    πr/2      = 7.14

     πr        = 7.14 x 2

                = 14.28

      r         = 14.28/π = 4.54

    area     = πr²/4

                = π (4.54)² / 4

                = π x 20.65  / 4

                = 64.9 / 4

                = 16.22km²