The four identical equilateral triangles can be
arranged together to make exactly the same equilateral triangle, only
bigger, just as shown in the upper left illustration.
The object is to arrange the four shapes shown in the center of the
illustration into the same shape as one of those shapes is, only
bigger. You are allowed to rotate and flip the shapes as you wish but
the pieces are not allowed to overlap in the final shape.
Move the pieces dragging them. To rotate/flip a piece over simply
click it - when the rotate mode is activated it will be rotated, when
the flip mode is activated it will be flipped over. To activate one of
the two modes click the respective button in the lower left part of
Use the Restart button to start the solving of the puzzle again.