# Labeling parts of a circle | Perimeter, area, and volume | Geometry | Khan Academy

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## About the Video

Radius, diameter, center, and circumference--all are parts of a circle. Let's go through each and make sure we understand how they are defined.

Practice this lesson yourself on KhanAcademy.org right now:

https://www.khanacademy.org/math/geometry/basic-geometry/circum_area_circles/e/radius_diameter_and_circumference?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

Watch the next lesson: https://www.khanacademy.org/math/geometry/basic-geometry/circum_area_circles/v/area-of-a-circle?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

Missed the previous lesson?

https://www.khanacademy.org/math/geometry/basic-geometry/circum_area_circles/v/circles-radius-diameter-and-circumference?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

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