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The entire wiki reimagined as a visual magazine with video discovery · Watch your interests come alive
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Cross section (geometry)
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In geometry and science, a cross section is the non-empty intersection of a solid body in three-dimensional space with a plane, or the analog in higher-dimensional spaces. Cutting an object into slice
Pinus taeda cross section showing annual rings, Cheraw, South Carolina.
Pinus taeda cross section showing annual rings, Cheraw, South Carolina.
Cone
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In geometry, a cone is a three-dimensional figure that tapers smoothly from a flat base to a point not contained in the base, called the apex or vertex.
Illustration from Problemata mathematica... published in Acta Eruditorum, 1734
Illustration from Problemata mathematica... published in Acta Eruditorum, 1734
In projective geometry, a cylinder is simply a cone whose apex is at infinity, which corresponds visually to a cylinder in perspective appearing to be
In projective geometry, a cylinder is simply a cone whose apex is at infinity, which corresponds visually to a cylinder in perspective appearing to be a cone towards the sky.