Best Answer

if you have the diameter or the arc, then you can divide the diameter by two, or you can use the arc to calculate it.

Q: How do you find the area of a circle without the radius?

Write your answer...

Submit

Still have questions?

Continue Learning about Geometry

The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.

If yo have the area of the circle, the square is irrelevant. Radius = sqrt(Area/pi)

Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared

To find the area of the circle pi*radius*squared and subtract the area of the figure inside

Area = Pi(r)2 - A circle with a radius of 12 inches has an area of 452.39 square inches.

Related questions

If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.

Well, what you do is you would find the circumference, or the distance around the circle.

In a circle, the area of the circle is pi times the radius squared

The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.

Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12

You find the area of a circle with pi times radius squared because the radius is half the circle so to find the full area you need to multiply it again.

The area of a circle is 153.86cm².find the radius of the circle

If yo have the area of the circle, the square is irrelevant. Radius = sqrt(Area/pi)

you take the radius and multiply it by itself. then you multiply the radius squared by 3.14 to get the area of a circle...

The answer depends on what information you are given.

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

If you know the circle's area then the radius can be found: pi*radius2 = area Divide both sides by pi: radius2 = area/pi Square root both sides: radius = the square root of (area/pi)