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GCSE Mathematics · key term
A flat part of the surface of a 3D shape. Each face is a two-dimensional shape.
Used by AQA, Edexcel and OCR
Specification G12 · Paper 1, Paper 2, Paper 3
Revise: 3D ShapesA flat part of this surface is called a face, and every face is itself a 2D shape. For example, a cube has square faces and a cylinder has circular faces.
Specification G12 · Paper 1, Paper 2, Paper 3
A flat part of the outside of a 3D shape. Each face is a 2D shape.
Revise: 3D Shape PropertiesWhen describing a solid, look at its outside and separate three kinds of feature: flat faces, curved surfaces and the places where flat faces meet.
Specification 8.01d, 8.06a · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
An individual flat surface of a solid.
Revise: Solid TerminologySome solids have only flat surfaces. These are called polyhedra: their faces are polygons, such as squares, rectangles or triangles. Other solids have curved surfaces.
A flat surface of a three-dimensional solid.
Count systematically, including parts hidden in a perspective drawing. Mark each face, edge or vertex as you count it.
State whether a surface is flat or curved. Under the convention used here, the circular boundaries of cones and cylinders are not counted as edges because they are not straight line segments where two flat faces meet.
For a prism or pyramid, first count the sides of its end face or base. Then use the appropriate counting pattern.
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