One of the vanishing puzzles where an object
vanishes just in front of your eyes after a simple manipulation. Just
figure out where the object got to and what, if anything, appears
instead of it.
Five matchsticks can be arranged into a stylized
version of a giraffe. The goal is to move one of them and in that way
let the giraffe to be rotated or reflected.
It is required to dissect an obtuse triangle into acute triangles only.
The first question is whether it is possible at all? If the answer is
"Yes", then the next question would be "How?"
