Posted by **Diala** on Sunday, November 28, 2010 at 1:46pm.

one way to resize a ring is to fill a bar into the ring.suppose a ring that is 20 mm in diameter has to be resized to fit a fingure 16 mm n diameter

what is the length of the bar that should be inserted in order to make the ring fit the fingure? ( Hint: write an equation of the ring assuming it is centered at the origin. Determine what the y-coordinate of the bar must be and then substitute this coordinate into the equation to find x

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