Maths
Shapes
2D shapes with sides and corners, 3D objects with faces, edges and vertices.
2D shapes
Flat shapes. They have length and width but no depth.
- CircleSides: 1 curved edge
Corners: 0Every point on the edge is the same distance from the middle. - TriangleSides: 3
Corners: 3Its three angles always add up to 180°. - SquareSides: 4
Corners: 4All sides the same length, all corners right angles. - RectangleSides: 4
Corners: 4Opposite sides the same length, all corners right angles. - PentagonSides: 5
Corners: 5Penta means five. - HexagonSides: 6
Corners: 6Bees build honeycomb in hexagons. - OctagonSides: 8
Corners: 8A stop sign is an octagon.
3D objects
Solid objects with length, width and depth. A face is a surface, an edge is where two faces meet, and a vertex is a corner where edges meet.
- CubeFaces: 6 flat
Edges: 12
Vertices: 8All six faces are the same square. Like a dice. - Rectangular prismFaces: 6 flat
Edges: 12
Vertices: 8Faces are rectangles. Like a cereal box. - Triangular prismFaces: 5 flat
Edges: 9
Vertices: 6Two triangle ends joined by rectangles. Like a camping tent. - Square-based pyramidFaces: 5 flat
Edges: 8
Vertices: 5A square base with triangles meeting at the top. Like the pyramids in Egypt. - SphereFaces: 1 curved surface
Edges: 0
Vertices: 0Perfectly round, like a ball. - CylinderFaces: 2 flat, 1 curved surface
Edges: 2 curved
Vertices: 0Two circles joined by a curved side. Like a tin can. - ConeFaces: 1 flat, 1 curved surface
Edges: 1 curved
Vertices: 1A circle base that comes to a point. Like an ice-cream cone.