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Video Definition 22--3D Geometry--Horizontal Cross-Sections of a Cone

Horizontal Cross-Section of a Cone

Topic

3D Geometry

Definition

A horizontal cross-section of a cone is the intersection of the cone with a horizontal plane, resulting in a circle.

Description

Horizontal cross-sections of a cone are important for understanding conical geometry. When a cone is sliced horizontally, the resulting shape is a circle, which is crucial for calculating properties like volume and surface area. This concept is applied in fields like engineering and manufacturing, where precise measurements are needed for conical components. In math education, studying cross-sections of cones helps students grasp the concept of symmetry and the properties of circles in three-dimensional space. For example, a horizontal cross-section of a cone at its midpoint results in a circle with the same radius as the cone's base.

Horizontal Cross-Section of a Cone
Think of the floors of this cone-shaped building as 
the horizontal cross-sections of the cone.

For a complete collection of terms related to 3D Geometry click on this link: 3D Geometry Video Collection.

Common Core Standards CCSS.MATH.CONTENT.5.MD.C.3
Duration 1 minutes
Grade Range 4 - 6
Curriculum Nodes Geometry
    • 3D Geometry
        • Cones
Copyright Year 2024
Keywords three-dimensional geometry, 3d Geometry, defnitions, glossary term