Ad hoctagon
I HAVE eight rods. I can use three of them to make the sides of a right-angled triangle of area 10 square centimetres.
Alternatively, I can use all eight of them to make the sides of an octagon, all of whose angles are the same, and all of whose vertices lie on a circle.
What is the area of that octagon?
£15 will be awarded to the sender of the first correct answer opened on Wednesday 18 February. The Editor’s decision is final. Please send entries to Enigma 1528, Â鶹´«Ã½, Lacon House, 84 Theobald’s Road, London…
