Question
In a triangle, PT is tangent and PAB is secant which
cuts on a circle at points A & B. If PT= 12 cm, PA= 8 cm then find the legth of AB.Solution
PT 2 = PAÂ `xx` Â PBÂ 122 = 8(8 + AB)Â 144 = 8(8 + AB)Â 18 = 8 + ABÂ AB = 18 - 8 = 10 cm
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