Point P lies on a circle with centre O and A is a point on the tangent through P.
If PA = 7 cm and OA = 25 cm, find the diameter of the circle. (please give in a easy way)
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Step-by-step explanation:
use the pythagoras rule in RIGHT ΔAOP -
√AO² - AP² = OP(radius)
r = √(25)² - (7)² = √625-49 = √576 = 24.
∴ diameter = 2r = 2×24 = 48 cm.
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