In this lesson we’ll look at the equation for a circle and how to use it to graph a circle, interpret points on a circle and write an equation given a graph or the special features of a circle. A circle can be defined by a center point and a radius of a certain length. In the equation of a circle.
Read MoreThe area of a circle is given by A=πr^2, where π is the constant approximately equal to 3.14, and r is the radius of the circle. The radius r is the distance from the center of the circle to the edge of the circle. The diameter of the circle is double the radius; it’s the distance from one side of the circle to the other, through the center of the circle.
Read MoreThe circumference of a circle is the distance around the circle (its perimeter). You can find the circumference if you know either the radius or the diameter.
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