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What is the measure of the radius of the circle that circumscribes a triangle whose sides measure 9, 40 and 41 ?

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40^2 + 9^2 = 41^2 = 1681

Hence it satisfies Pythgorus theorem. As we know that  a traingle inside a circle can be right angled iff the hypo of the right angled traingle is diameter .

 

So Diameter = 41 Unit

Radius = 41/2 = 20.5 Unit
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