The radius of the circle is 5 cm. Distance of point P from the centre is 11 cm. Find the maximum number of tangents that can be drawn to a circle through point P. (A) 2 (B) 1 (C) One and only one (D) Zero
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1
Answer:
we can draw only 1 tangent
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9
Answer:
Let O be the centre of the given circle and let P be a point such that OP = 10 cm.
Let PT be the tangent such that PT = 8 cm.
Join OT.
Now, PT is a tangent at T and OT is the radius through T.
Therefore, OT⊥PT.
Using pythagoras theorem in △OTP, we have,
OP 2 =OT 2 +PT 2
OT 2 =100−64=36
OT=6 cm
Therefore, the radius of the circle is 6 cm.
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