We're going out on a limb here, and assuming that you're talking about a circle.
Area of a circle = pi R2
So Radius = sqrt(area/pi)
and Diameter = 2 times radius.
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multiple the diameter by 2 to get the radius, then use your equation and go from there
To find the diameter of a circle when given the area, we first need to calculate the radius. The formula for the area of a circle is A = πr^2, where A is the area and r is the radius. Given that the area is 56, we can rearrange the formula to solve for the radius: r = √(A/π) = √(56/π) ≈ 4.74. Finally, to find the diameter, we double the radius, so the diameter of the circle is approximately 9.48 units.
The diameter of the semicircle will be twice the radius.
Easy, you find the area of the circle (Pi X Radius squared) and then multiply it by the height. Your question asks about using the diameter...the radius is half of the diameter.
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)