pi r2
The area of a circle is pi times the circle's radius squared = pi*radius2
the shortest way to get from one location on earth to another
Knowing the area doesn't tell you the perimeter. There are an infinite number of different sizes and shapes with different perimeters that all have the same area. The shortest possible perimeter for any area is a circle. The shortest possible perimeter for any area with straight sides is a square. And also by the way, there are many different units for area. "Feet" is not one of them. "Square feet" is.
Yes the radius does affect the area of a circle. In fact to find the area of a circle people need to know the radius. The radius is half way between the middle of a circle to any of it's edges. The formula for the area of a circle ispi*radius squaredYou must first find the square of the radius and multiply it by pi(3.14.) For more help go to Wikipedia.com and type circle.
The circle must have a radius. If you do not know it then you find out the area using the diameter, (this is the length of two points directly across from each other on the circle.The equation for the area of a circle when using the diameter =π × (d/2)²By the way, π is approximately = 3.14159265. or 22/7A circle with no radius has no area and is sometimes considered by certain branches of geometry and topology as a point.
Pi is used in many ways today. The simplest way it to find the circumference (the perimeter) of a circle or the area (amount of space inside) of a circle.
the way to use pi is to find the circuference of a circle
The formula for calculating the area of a circle is A r2, where A is the area and r is the radius of the circle. Another way to calculate the area is using the formula A d2/4, where d is the diameter of the circle.
To find the radius of a circle with a given area of 628, you can use the formula for the area of a circle, A = πr^2, where A is the area and r is the radius. Rearranging the formula to solve for the radius, you get r = √(A/π). Substituting the given area of 628 into the formula, you get r = √(628/π) ≈ √(199.87) ≈ 14.14. Therefore, the radius of the circle is approximately 14.14 units.
The purpose of sailing from one point to another by way of the great circle is that it's the shortest distance between them, and therefore takes the least time.
If they are in the same plane then it is the length of the straight line joining them. If they are not in a plane then things get complicated. On the surface of the earth (a sphere), the shortest distance is an arc along the great circle. The great circle is a circle whose centre is the centre of the earth and which passes through the two places. This is why New York to Tokyo flights go over the Arctic region. With polyhedra, one way to find the shortest distance is to mark the two points on a net the shape. If you can draw a straight line between the points such that all of it is on the net, then that is the shortest distance. You may need to play around with different nets.
You use pi to find volumes that include circles, as volume = area x depth, and the area of a circle always involves pi