how can we get the area of a circle.?

Question

if detail plz. it s problem for me that how many plants can i plant there. i cant calculate

Answer 1

pi times radius squared, same as..

pi x (radius x radius).

Checkout the link below...I think this is the easiest explanation.

Answer 2

The formula for area of a circle is:
pi times radius squared

OR: the radius (the length from the middle of the circle to the edge) multiplied times itself, then multiply that total times 3.14.

If your circle is 20 feet across, the radius would be 10 feet. 10 times 10 is 100, then multiplied by 3.14 gives you about 314 square feet of area.

Is this what you need to calculate your plantings?

Answer 3

First you need to measure the radius of the circle. That's the distance from the center to the side. Another way to get that is to measure from side to side and divide by two. That may be easier than trying to figure out exactly where the center is. Suppose the number you come up with is three feet. Multiply that by itself, which will give you nine square feet. Multiply that by pi. 3.14 is close enough. For this purpose, even 3 would be close enough. Anyhow, 3.14 x 9 square feet = 28.26 square feet.

Answer 4

pi times the radius of the circle squared.

If the radius (from the middle of the circle to the outside) is 4 feet (i.e. the circle is 8 feet across), the equation would be 4 x 4 (four, squared), then times 3.14

16 x 3.14 = roughly 48 square feet

Answer 5

Pi(3.14) x r(radius*) squared = Pi x r2



* Radius is the length from the outside of the circle to the middle.

Answer 6

3.14 X radius X radius = area of a circle
radius length from midpoint to the periphery. half the distance across the cirlce

Answer 7

A=pi r^2

p=3.14
r=radius

so if the radius equals 1 foot
A= 3.14 x 1 squared = 3.14 square feet.

Answer 8

find the center of the circle and measure the radius

then use pi r squared

Answer 9

1/2pieR2. do 3.14 times the radius (which is half the diameter) and square that, then divide it by 2.