3 ms·
Another puzzle: what's the radius ...
- klodolph 17y agoOkay, this one is just... too easy. I can see why some people might find it confusing, though.
- RiderOfGiraffes 17y agoPrompted by the discussion here: http://news.ycombinator.com/item?id=1013789 http://news.ycombinator.com/item?id=1013789 The exchange started here: http://news.ycombinator.com/item?id=1013929 http://news.ycombinator.com/item?id=1013929 Image found here: http://zenoferox.blogspot.com/2008/02/circle-puzzle.html http://zenoferox.blogspot.com/2008/02/circle-puzzle.html Warning: spoilers.
- ErrantX 17y agoThat's barely even a puzzle. It's more of an optical illusion
- RiderOfGiraffes 17y agoLots of people take a long time to get this one. It's what I call an STF problem - Slap the Forehead." Unless you see it instantly, when you do see it you are so frustrated ...
- JBiserkov 17y agoit's more of "high school training in math has failed you" (right triangle <=> Pythagoras) -> bad
- tlipcon 17y agoWithout knowing that the + centers on the circle, is this actually possible?
- mitko 17y agoNo. Take any circle that passes through the loweset point (under the 3" mark) and the right angle vertex that is down and left of the blue line. Keep anything else fixed. This way infinitely many such constructions were created, and the radii were different.
- RiderOfGiraffes 17y agoNo. With these sorts of problems the convention is that if it's close then it's exact, and if it was intended not to be exact then it's made obviously "off."
- deleted 17y ago[deleted]