Geometry · Area, Surface Area & Volume
Cross-Section
HSG-GMD.B.4
Definition
The two-dimensional shape formed when a plane cuts through a three-dimensional figure.
Examples
- A horizontal slice through a cylinder produces a circle as its cross-section.
- A vertical slice through a rectangular prism produces a rectangle.
Key rule
The shape of a cross-section depends on the angle and direction of the slice.
Memory hook
The flat shape revealed by a slice.