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Q: How do you find the area of a circle if you have the diameter?

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Circumference= 3.14 x Diameter Area of circle= 3.14 x diameter x diameter

To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)

Diameter is 8.64444

A semicircle is 1/2 of a circle. Find the area with the diameter you are given as if you had a whole circle, then divide that answer by 2 to get the area of the semicircle.

The area of a circle with a diameter of 6 units is: 28.27 square units.

In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.

ANUS

Area of a circle = pi*radius2 Radius = diameter/2

Area = 1/4 of (pi) x (diameter)2

Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)

To find the diameter of a circle, you will either need to know the area or its circumference. If you know the area: diameter = 2 x squareroot(area / Pi) If you know the circumference diameter = circumference / Pi

Area of the circle = pi*radius2 = pi*52

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