The figure above shows a drop-leaf table. With all four leaves down the tabletop is a square, and with all four leaves

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2019-04-26_1803.png
The figure above shows a drop-leaf table. With all four leaves down the tabletop is a square, and with all four leaves up the tabletop is a circle. What is the radius, in meters, of the tabletop when all four leaves are up?

A. \(\dfrac12\)

B. \(\dfrac{\sqrt2}2\)

C. \(1\)

D. \(\sqrt2\)

E. \(2\)

Answer: B

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