## What is the formula for radius?

The two formulas that are useful for finding the radius of a circle are C=2*pi*r and A=pi*r^2. We use algebra skills in solving for our variable r. We know that the constant pi is always 3.14. Another word related to the radius is diameter, which is always twice the radius.

## How do you find the radius of a circle from the area?

Ex: Find the Radius of a Circle Given the Area –

## How do you find the radius and diameter of a circle?

Just remember to divide the diameter by two to get the radius. If you were asked to find the radius instead of the diameter, you would simply divide 7 feet by 2 because the radius is one-half the measure of the diameter. The radius of the circle is 3.5 feet. You can also use the circumference and radius equation.

## What is radius circle?

A radius is a straight line from the center of a circle to the circumference of a circle. If you have two or more of them, they are referred to as radii. All radii in a circle will be the same length. The circumference is the outside perimeter of a circle. It’s the distance around a circle.

## What is a radius of a cylinder?

The radius R, or the distance from the center of a cylinder to its edge, and its length, L are usually the defining property of a cylinder. If your cylinder is standing upright, you might call the “length” a “height” instead.

## What is the radius of a half circle?

A semicircle has a radius of 365 inches.

## What is the formula of a radius?

The two formulas that are useful for finding the radius of a circle are C=2*pi*r and A=pi*r^2. We use algebra skills in solving for our variable r. We know that the constant pi is always 3.14. Another word related to the radius is diameter, which is always twice the radius.

## How fo you find the area of a triangle?

Example finding area of triangle –

## How do you find a circumference?

Circumference of a Circle | MathHelp.com –