Q: How to find area and perimeter of circle?

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Unless the area is a regular polygon (or a circle) you cannot.

The area of a circle is described by the equations: A=πr2 and the perimeter of a circle is described by the equation: C=πd where: A is the Area C is the circumference, or perimeter r is the radius d=diameter=2r π= pi, the ratio of diameter to circumference (3.14159)

There is no perimeter of a circle. Only flat shapes have perimeters. You can however, find the circumference, surface area, and volume.

Area of any circle = pi*radius2

void main() { float pi=3.14,area,perimeter,r=2; area=pi*r*r; perimeter=2*pi*r; getch(); }

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If 'R' is the radius of the circle, then-- area of the circle is [ pi R2]-- perimeter of the circle is [ 2 pi R ]

Unless the area is a regular polygon (or a circle) you cannot.

The area of a circle is described by the equations: A=πr2 and the perimeter of a circle is described by the equation: C=πd where: A is the Area C is the circumference, or perimeter r is the radius d=diameter=2r π= pi, the ratio of diameter to circumference (3.14159)

There is no perimeter of a circle. Only flat shapes have perimeters. You can however, find the circumference, surface area, and volume.

The perimeter of a circle is its circumference

Area of any circle = pi*radius2

void main() { float pi=3.14,area,perimeter,r=2; area=pi*r*r; perimeter=2*pi*r; getch(); }

Circumference ("perimeter") of a circle = (pi) x (diameter of the circle)

The circumference of a circle is the length of the circle's perimeter.

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.

Of a circle,the area is: Pi * r^2,perimeter is: 2* Pi * rWhere, r is the distance from the circle's center to the perimeter, and Pi is a constant: Pi ~ 3.14.

First you have to measure the diameter of the circle. The diameter is pi (pi is approximately 3.1415) times the diameter is the perimeter. Half the diameter is the radius and the area of a circle is pi times the radius squared. So for example, let us say that you have a circle with a diameter of 3 inches. The perimeter is then about 9.42 inches, and the area is about 7.07 square inches.