Presentation on theme: "Properties of 3-D Shapes"— Presentation transcript:
1 Properties of 3-D Shapes CuboidCubePrismTriangular PrismHexagonal PrismCylinderConeSphereSquare-Based PyramidTetrahedronOctahedronDodecahedronIcosahedron
2 Cuboid Key Feature Six faces which are all rectangles. Faces 6 Corners 8Edges12Planes of Symmetry?If the cuboid has no square faces then it has ...three.If two opposite faces are square then it has ...five.Is a Cuboid a Prism?Yes, because it has a rectangular cross-section throughout its length.
3 Cube Key Feature Six faces which are all squares. Faces 6 Corners 8 Edges12Planes of Symmetry?NineIs a Cube a Prism?Yes, because it has a square cross-section throughout its length.
4 PrismKey FeatureThe shape of its cross-section is the same throughout its length.Faces, Corners, Edges?It depends what sort of prism it is.Planes of Symmetry?It depends what sort of prism it is.Examples of prisms include triangular prism, hexagonal prism, cuboid, cube and cylinder.
5 Triangular Prism Key Feature A prism with a triangular cross-section. Faces5Corners6Edges9Planes of Symmetry?If the triangle is equilateral then it has ...four.If the triangle is isosceles then it has ...two.If the triangle is scalene then it has ...one.
6 Hexagonal Prism Key Feature A prism with a hexagonal cross-section. Faces8Corners12Edges18Planes of Symmetry?If it’s a regular hexagon then it has seven.
7 Cylinder Key Feature A prism with a circular cross-section. Faces, Corners and EdgesThe normal definitions of faces, corners and edges are not appropriate for a cylinder.Planes of Symmetry?Infinite
8 ConeKey FeatureThe point of the cone is directly above the centre of the circular base.Faces, Corners and EdgesThe normal definitions of faces, corners and edges are not appropriate for a cone.Planes of Symmetry?Infinite
9 SphereKey FeatureEvery point on the surface of the sphere is the same distance from the centre.Faces, Edges and CornersThe normal definitions of faces, corners and edges are not appropriate for a spherePlanes of Symmetry?Infinite
10 Square-Based Pyramid Key Feature Faces 5 A shape with a square base and triangular sides that meet at a point.Corners5Edges8Planes of Symmetry?Four
11 Tetrahedron Key Feature Four faces which are all equilateral triangles.Faces4Corners4Edges6Planes of Symmetry?Six
12 Octahedron Key Feature Eight faces which are all equilateral triangles.Faces8Corners6Edges12Planes of Symmetry?Nine
13 Dodecahedron Key Feature Twelve faces which are all regular pentagons. 12Corners20Edges30Planes of Symmetry?Fifteen
14 Icosahedron Key Feature Twenty faces which are all equilateral triangles.Faces20Corners12Edges30Planes of Symmetry?Fifteen