A circle is a perfectly round geometric shape which you will see again and again in your studies of math concepts. You will need to have an understanding of its diameter, radius, circumference, area, arcs, and sectors. You will also work with objects that are tangent to a circle and what that means.
Diameter of a Circle
Radius of a Circle

Circumference of a Circle

Area of a Circle


Sector and Arc of a Circle

Inscribed Angles in a Circle

Tangent to a Circle


