This diagram shows the frustum of a cone. You can adjust the angle [math]\alpha[/math] of the sector used to create the cone as well as height [math]h'[/math] of the frustum.[br][br]The frustum has an upper base of radius [math]r'[/math], lower base with radius [math]r[/math], a height of [math]h'[/math] and a slant height of [math]l'[/math]