the tangent PA has drawn to a circle with centre O from the external point P. If PA=4 cm, OP=5cm, the radius of circle is?
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18
let the radius be OA.
given that op=5cm and PA =4cm...
if. you join O to the point of contact you will get the radius
and if u observe..you can find a right angle triangle..hence by Pythagoras theorem you will get the value of OA that is equal to 3
given that op=5cm and PA =4cm...
if. you join O to the point of contact you will get the radius
and if u observe..you can find a right angle triangle..hence by Pythagoras theorem you will get the value of OA that is equal to 3
shaili143:
but the answer is 6
that's why I asked for te solution
better you check it once again
Answered by
6
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