- Definition
The "base" of a 3D shape is usually the flat surface it sits on, like the bottom of a pyramid. For shapes like boxes (prisms), the two identical and parallel ends are called the bases.
base (shape) is a term used in Ontario’s Kindergarten to Grade 8 curriculum.
The descriptions on this page are SmartStudy’s own original, plain-language writing — not the Ministry’s wording. They are aligned to the Ontario Curriculum, © King’s Printer for Ontario. For the Ministry’s official wording, see the source link below. SmartStudy is an independent service and is not affiliated with, endorsed by, or sponsored by the Government of Ontario or the Ministry of Education. Ontario Curriculum and Resources ↗