Heron's problem
Which is the shortest way from a point A to another point B (A and B are on the same semiplane with respect to a line r), that passes through a point of r? A mirror shows the solution. See also a detail.
© matematita
The image belongs to the sections...:
Other problems (From the exhibitions of matematita)
From "mirrors" (From "XlaTangente")
Images in a mirror (From the exhibitions of matematita)