How to cut an equilateral triangle into only four pieces so they can be rearranged into a square? Henry Dudeney's solution to this (the Habberdasher's problem) is particularly neat as it can work using hinged pieces. [more] [thanks to] [code]
If you wait for perfect conditions, you will never get anything done… I saw this quote, and I liked it, and wanted to use it. It was the first line only. I then went on to Google it before resharing it. I like to Google before I post, just like one needs to think before one speaks. It turns out, there is more to that quote, and it comes from the Bible, Ecclesiastes 11:4-10
"4 If you wait for perfect conditions, you will never get anything done. 5 God’s ways are as hard to discern as the pathways of the wind, and as mysterious as a tiny baby being formed in a mother’s womb. 6 Be sure to stay busy and plant a variety of crops, for you never know which will grow — perhaps they all will. 7 Light is sweet; it’s wonderful to see the sun! 8 When people live to be very old, let them rejoice in every day of life. But let them also remember that the dark days will be many. Everything still to come is meaningless. 9 Young man, it’s wonderful to be young! Enjoy every minute of it. Do everything you want to do; take it all in. But remember that you must give an account to God for everything you do. 10 So banish grief and pain, but remember that youth, with a whole life before it, still faces the threat of meaninglessness.