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Theorem 1

Theorem 2

Theorem 3

Theorem 4

Theorem 5

Theorem 6

Theorem 7

The Seven Theorems

## Tangent lengths
Fifth circle theorem:
You can use the cursor to move point C, and you can change the size of the circle by moving point A or B. If you need them, the seven circle theorems here Tim Devereux, Created with GeoGebra |