The radius is just the line from the center of the circle. The diameter goes all the way through the center. The circumference is the area around the circle. You find the radius by taking the diameter and …

If we say the circumference is 1600 pi, and this is equal to pi times the diameter, we can just divide both sides by pi to get the diameter, which is going to be 1600.

*To find the diameter, measure the circle from its left-right points [divide the circle in half and measure the line you made, make sure the line is straight]. Suppose you get 10in, that is your diameter.

The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter.

Find the circumference of a circle when given either the radius or diameter. Find the radius or diameter of a circle when given the circumference.

The circumference of a circle is its perimeter. To calculate it, use the formula 2πr, where r is the radius of the circle. The area of the circle can be found by the formula πr^2.

Labeling parts of a circle Radius, diameter, & circumference Radius and diameter Radius & diameter from circumference Relating circumference and area Circumference of a circle Area of a circle

The length is given, and the width can be calculated using the formula for circumference of a circle. Once you have both values, just multiply l x w to find the area, then add it to the area of the two …

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When the base is a circle, the perimeter of a circle is pi times its diameter or pi times two times its radius or two pi r. So, if we're talking about a cylinder like this, this perimeter of the base is going to be the …