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Cone development Calculator of right circular cone / truncated right circular cone development |

Unfolding a 3D sphere to 2D shapes 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 the hemisphere cut at an angle Volume of hemisphere asymmetrically cut by a flat plane under a given angle. |

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

Equations of the line of intersection of two planes 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. |