A circle has its centre at O . A tangent drawnÂ from a point P , whi – McqOptions

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1.	A circle has its centre at O . A tangent drawnÂ from a point P , which is situated outside the circle,Â touches the circle at A. If PA = 4 cm & PO=5 cm, then theÂ length of the radius of the circle is
A.	1 cm
B.	2 cm
C.	3 cm
D.	4 cm
Answer» D. 4 cm

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