A RECTANGLE has sides &tgr; and 1/&tgr;, where &tgr; is the golden ratio &tgr; = 陆 (鈭�5+1). The circle circumscribing the rectangle is drawn, and semicircles are constructed on each of the four sides.
What is the total area of the four 鈥渃rescent moons鈥�, within the semi-circles, but outside the large circle?
A 拢10 book token will be awarded to the sender of the first correct answer opened on Thursday 13 July. The Editors鈥� decision is final. Please send entries to Enigma 826, New 女生小视频, King鈥檚 Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 820 was Andrew Plant of Lymington in Hampshire.
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Answer to Enigma 820
Hard cheese
No, you cannot clear the 6 squares in 1000 moves.
