Drag the vertices in the base to change the shape of the base. [br]Drag point G over point H to change the base to a quadrilateral. [br]Drag point F over G and H to create a triangular base. [br]Keep points I, J and M on the grid to see a right prism. [br]Move point M away from the grid lines to change the angle between the base and the sides. [br]Move the vertices of the base and point B to create a right rectangular prism and a cube.