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 

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Radius of a Circle 

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Circumference of a Circle 

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Area of a Circle 

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Sector and Arc of a Circle 

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Inscribed Angles in a Circle

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Tangent to a Circle

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