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Shmoop University
Shmoop: Attributes of Circles
This video explains circumference, radius and diameter in an appealing way for students to understand.
Expansion Learning
Expansion Learning: Basic Shapes (Part One)
Video provides students with an explanation of the basic shapes of square, rectangle, triangle, and circle.
Mocomi & Anibrain Digital Technologies
Mocomi: Who Discovered Pi?
Learn about Archimedes and the discovery of Pi.