The formula for a radius is the diameter of a circle divided by two. The radius of a circle is defined as the distance from the middle of a circle to any point on the edge of the circle.
Know MoreAnother way to calculate the radius of a circle is by using the circumference. The equation using the circumference is the circumference of the circle divided by pi times two. Pi (π) is a number that is approximately 3.14. The radius can also be calculated if the area is known; the radius is equal to the square root of the area of the circle divided by pi.
Learn more about ShapesThe diameter of a standard or professional basketball hoop is 18 inches. The backboard of a professional goal measures 72 inches wide by 42 inches tall.
Full Answer >The volume of a pipe that is 1 foot long and 6 inches in diameter is 0.2 cubic foot. This correlates to approximately 1.5 gallons of standing water potentially inside the pipe.
Full Answer >If the circumference or the area of a circle is known, pi can be used to find the diameter and the radius of that circle. Likewise, if the radius or diameter is known, pi can be used to find out the circumference or the area.
Full Answer >There are different ways to find the diameter of a circle depending on what information you start with. If you know the circumference of the circle, divide the circumference by pi to find the diameter.
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