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What is the area of a circle with a diameter of 6.4 cm?
Area of a circle = pi R2 R = radius = 1/2 of the diameter Area = pi (3.2)2 = 10.24 pi = 32.1699 square cm(rounded)
What is the radius of a circle with a diameter of 15 cm?
The diameter of a circle is twice its radius. Thus the radius of a circle is half its diameter. → a circle with a diameter of 15 cm has a radius of 15/2 cm = 7.5 cm
What is the area of a circle whose diameter is 70 cm?
Area of a Circle (A) = pi times the radius (r) squared A = (pi) (r)2 Diameter of a Circle (d) = 2 times the radius (r) d = 2r First, find the r Since the diameter (d) = 70 cm, then 70 cm = 2 r (70 cm)/2 = r r = 35 cm Now that you have found the value of the radius (r), you can plug in r for the equation for the area (A) of a circle: A = (pi) (35 cm)2 A = (pi) 1225 cm2 At this point you can multiply 1225 cm2 by pi with a calculator to get the value of 3848.45100065 which can be simplified to 3848.5 cm2
What is the radius of a circle that has a 10 cm diameter?
The radius of a circle is half the length of its diameter. Therefore, if the diameter of the circle is 10 cm, the radius would be half of that, which is 5 cm. The formula to find the radius of a circle is r = d/2, where r is the radius and d is the diameter.
If a circle has a diameter of 2 cm what is the radius of the circle?
1cm
