Videos - Jump directly to the list of videos in the playlist.

Playlist - Visit the complete playlist of videos on YouTube.

Worksheets - Get extra practice on these concepts with custom worksheets.

Learn how to identify key parts of a circle and the terminology associated with them.

Learn where the equation for the circumference of a circle comes from and how to use it.

Learn where the equation for area of a circle comes from and how to use it.

Learn how to use one piece of information about a circle (radius, diameter, circumference or area) to find the remaining pieces of information.

Learn why pi is a constant value and why we use 3.14 as a common estimate for it.

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