Recent questions tagged circles

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What is the measure of the radius of the circle that circumscribes a triangle whose sides measure $9, 40$ and $41$?$6$$4$$24.5$$20.5$
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PQRS is a square. SR is a tangent (at point S) to the circle with centre 0 and TR = OS. The ratio of the area of the circle to the area of the square is:$\pi/3$$11/7$$3/\...
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