3D Solids Vocabulary

corner (vertex)- a point where two or more sides, surfaces or edges join a face – a flat surface of a 3D shape an edge – the place where two surfaces join

A cube - a solid shape that has 6 square faces all equal in size

A prism - a solid 3D shape with identical, parallel bases and all other faces are rectangular Square Prism Pentagonal Prism Cube Triangular Prism

A cylinder - a solid shape with one curved surface and two equal circular faces

A solid - a 3D shape having length, depth, and height

A net - a flat shape which can be folded into a 3D solid

apex – in a pyramid, the vertex at which all lateral faces meet

polyhedron – a 3D figure whose faces are polygons

collinear points – points that lie on the same line coplanar points – points that lie on the same plane

Parallel lines– two coplanar lines that do not intersect

skew lines– two non-coplanar lines that do not intersect

A cuboid is a box-shaped object. It has six flat sides and all angles are right angles. And all of its faces are rectangles. It is also a prism because it has the same cross-section along a length. In fact it is a rectangular prism.right anglesprism

Polyhedron or Not? Give it a try! (It’s on the back of your definitions page.) Then do the practice.

ExamplesNon-examples Any prismcylinder cubecone Any pyramidsphere Polyhedra What non-polyhedron figure has a single vertex? cone What non-polyhedron figure has 2 parallel bases that are circles? cylinder What non-polyhedron figure has all its points at the same distance from an interior point? sphere Which polyhedron figure has an apex? pyramid

Name these solid shapes SPHERE CUBE CYLINDER CUBOID SQUARE PYRAMID