if the tangent at a point P to a circle with center O cuts line through O at Q such that PQ=12 cm and OQ=13cm . find the diameter of the circle.
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Answer:
In triangle POQ using pythgores
169 = 144 + radius^2
169 - 144 = radius^2
25 = radius^2
radius = 5cm
So
diameter = 10 cm.
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