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# How is pi used to determine the area of a circle?

Updated: 9/25/2023

Wiki User

9y ago

Area of a circle equals pi (3.14) times the radius squared.

Wiki User

9y ago

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Q: How is pi used to determine the area of a circle?
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### Pi can be used to calculate the blank of a circle?

Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle

### Why is the volume pi r h for a cylinder?

pi r^2 h is used to determine the volume of a cylinder because when determing the area of a shape you first have to determine the area of the the base of the object and then multiply it by the height. The base of a cylinder is a circle and to find the area of a circle you use pi r^2 and hence the reason why pi r^2 is used to find the volume of the cylinder.

### Determine the square feet in a circle?

The formula for the area of a circle is pi x radius x radius or pi(r2).

### How can you determine the area of a circle by using the radius squared and without finding the radius?

The area of a circle is pi * radius2. If you already have the radius squared, you just have to multiply that by pi.

### How is the perimeter and area of a circle related?

They both use pi to determine their values

### How have you used pi?

To find out the area of a circle.

### How do you determine the area of a 12' circle?

The area of a circle with a 12' diameter is pi*(d/2)2 = 113.1 sq feet.

### The circumference of a circle is 18pi inches Determine the area of the circle?

First we have to find the radius: 2*pi*radius = 18*pi Divide both sides by 2*pi to find the radius: radius = 9 inches Area of a circle = pi*radius2 Area = pi*92 = 81pi or 254.4690049 square inches

### When is pi typically used in mathematics?

Pi is used to find area and circumference of a circle.

### How is pi r squared used?

It is used to find the area of a circle as pi*radius2

### What does pi have to do with the area and circumference of a circle?

It is used in finding the circumference and area of a circle. Circumference = 2*pi*radius or pi*diameter measured in linear units Area = pi*radius2 measured in square units

Area = (pi) (R)2