1.

PAB is a secant to the circle from a point P outside the circle. PAB passes through thecentre of the circle and PT is a tangent. If PT- 8 cm and OP 10 cm, find the radiusof the circle.

Answer»

as in the figure we can see that with the help of Pythagorasop²⁼ot²⁺pt²so 100-64=OT^2OT= √36 6cm



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