cone /first sense

   A three-dimensional shape having a surface formed by a straight line (the side length) passing through a fixed point and moving along a circular curve. It usually refers to a right circular cone — a cone in which the side length remains a constant length. The volume of a right circular cone equals one-third of pi (3.14159) times radius squared times height. Its surface area (including circular side) equals pi times radius times the sum of radius plus side length. Lateral area (not including circular side) equals pi times radius times side length.

Glossary of Art Terms. 2014.

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