Click a 2D shape to count its sides, corners and discover what makes it special.
n = number of sides · a side is a straight edge · a corner (vertex) is where two sides meet
For every flat (2D) shape, the number of sides always equals the number of corners (vertices). A triangle has 3 of each, a square has 4, a hexagon has 6, and so on. Shapes that are the same on both halves when cut are called symmetrical — a circle has an infinite number of lines of symmetry!