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Earn +20 ptsQ: What is area of circle r equals 30?
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If the area of a circle is 25 square units what is the radius of the circle?
area equals pi r squared therefor r squared equals area over pi. Now find square root of r squared and you have "R" (radius) = 2.821
Find the circumference and area of the circle if d equals 30 Use n equals 3.14?
The circumference of a circle is 2 * r * pi or d * pi; the diameter "d" = 2* the radius "r". "pi" is - VERY approximately! - 3.14. The area of a circle is pi * r^2. There is a calculator built into Windows, or you can use the calculator built into Google.
Is c equals 2πr the same as c equals πr squared?
No. C = 2*pi*r is the equation representing the circumference of a circle. The area of a circle is equal to pi*(r^2).
What is the area of a circle if the r equals half?
Area = pi*0.52 = 0.785 square units to 3 d.p.
Area of a circle with a radius of 12?
Area of a circle = Pi times r^2. r=12 A = pi x (12^2)= pi x 144 equals approximately 452.3893421
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