Two secants PAB and PCD are drawn to a circle from an outside point P. Then, which of the following is true?

Two secants PAB and PCD are drawn to a circle from an outside point P.

1.	Two secants PAB and PCD are drawn to a circle from an outside point P. Then, which of the following is true?
A.	PA . PB = PC + CD
B.	PA. PB = PC . PD
C.	PA + PB = PC + PD
D.	PA - PB= PC. CD
Answer» C. PA + PB = PC + PD

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Two secants PAB and PCD are drawn to a circle from an outside point P. Then, which of the following is true?

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