Circle Theorems : Tangent Properties Investigation

Author:
Chris Mann
Topic:
Angles, Circle, Pythagoras or Pythagorean Theorem
Tangent properties in circle theorems investigation.
Is there a relationship between the lengths of the tangents? What shape is created in the shaded region? How can the length from the centre to the point where the tangents meet be found? Are the triangles congruent? Why?

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