Learn how to solve problems with arcs of a circle. An arc is a curve made by two points on the circumference of a circle. The measure of an arc corresponds to the central angle made by the two radii ...

The area of a circle is the amount of two-dimensional space enclosed by its circumference. The area of a circle is calculated using the formula: 𝐴 = 𝜋𝑟² The area of a sector is the two-dimensional ...

The radius of a circle or a sphere is the distance between the center and the edge. The radius can be used to calculate a circle's diameter, area and circumference. Likewise, a sphere's volume is ...