The area of the circumscribed circle about a square is double of the area of the inscribed circle in the square.

Proposition 1 Proposition 2 Proposition 3 Proposition 4 Proposition 5 Proposition 6 Proposition 7 Proposition 8 Proposition 9 Proposition 10 Proposition 11 Proposition 12 Proposition 13 Proposition 14 Proposition 15

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