Calculator of right circular cone / truncated right circular cone development

If you want to made a DIY sphere, you need to unfold the sphere to 2D shapes, or, more strictly speaking, approximate the sphere using petals, or "orange peels" (also called the lunes) on the plane. The calculator calculates basic parameters of such 2D peel and displays coordinates of points for drawing one peel on a plane.

Volume of hemisphere asymmetrically cut by a flat plane under a given angle.

This online calculator calculates the general form of the equation of a plane passing through three points

This online calculator finds the equations of a straight line given by the intersection of two planes in space. The calculator displays the canonical and parametric equations of the line, as well as the coordinates of the point belonging to the line and the direction vector of the line.