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Prove All Circles are Similar

Videos and lessons to help High School students learn how to prove that all circles are similar.

Common Core: HSG-C.A.1

Related Topics:
Common Core (Geometry)

Common Core for Mathematics

Similarity of Circles
How to prove all circles are similar.

Geometry2D - Similarity - Circles
Theorem 1 Scaling of a circle results in a circle. The radii of these circles are related by a scaling factor.
Theorem 2 Any two circles are similar.
Theorem 3 For any two circles, positioned outside of each other, there is a transformation of scaling that transforms one into the other.

Similar circles.

Proving Circles Similar.

Similar circles
Compare radius, circumference and area.

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