Best Answer

Area = pi times r squared

SO

r = square root of (area/pi)

d = 2 r

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

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

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.

h

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

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

Related questions

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

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

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.

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.

Diameter is 8.64444

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

h

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

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

ANUS

Divide the circumference by pi, and that will give you the diameter. Then take half of the diameter (the radius), and plug it into the formula for the area of a circle (A=πr²)