Proofs in Plane Geometry - Alternate Segment Theorem

Proofs in Plane Geometry - Alternate Segment Theorem

TGM Original Questions

In the diagram, \(SA\) is the tangent to the circle with centre \(O\) at \(A\) and \(AB\) is a diameter. \(C\) is a point on the circle and the tangent to the circle at \(C\) intersects \(SA\) at \(T\). \(BCS\) is a straight line. Prove that

  1. angle \(CTS = 2 \times\) angle \(CAT\) ,
  2. \(ST = CT\) , and
  3. \(SC \times OC = AC \times AT\) .

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