square
rectangle
A square or quadrilateral.
A triagular based pyramid has 4 corners, 6 edges and 4 faces
A triagular based pyramid has 4 corners, 6 edges and 4 faces
Rectangle with round corners
a quadrilateral
4
a square of course
A triangular pyramid has 4 corners and 6 edges (and 4 faces).
A tetrahedron; a shape made of four triangles.
rectangle or square