Geometry and Measurement: Shape, Level 3
AO1: Classify plane shapes and prisms by their spatial features. This means students will be able to classify is to define the characteristics of things and use these characteristics as a basis for sorting. Plane figures are those that lie flat, so have only two dimensions. So circles, triangles, and hexagons are all plane shapes. At Level Three students should be able to classify plane shapes by the following characteristics, number of sides and angles, e.g. all triangles have three sides, parallel or non-parallel sides, e.g. a trapezium has one pair of parallel sides, equal or unequal side length, angle size (less than, equal to, greater than a right angle), lines of mirror symmetry and order of rotational symmetry (e.g. A square maps onto itself four times in a full turn). Prisms are solid shapes that have a fixed cross-section. A loaf of bread can be seen as a rectangular prism since the slices are the same rectangle. So prisms are classified by their cross-section, e.g. a triangular prism has triangular cross-sections. In this way a cylinder can be seen as a type of prism though its cross-section is a circle. .
AO2: Represent objects with drawings and models. This means students will make drawings of objects can take the form of isometric projections, plan views or nets.
Note that a net is a flat shape that folds to form a solid. Many different nets form the same solid, e.g. there are eleven different nets that form a cube. At Level Three students need to create two-dimensional drawings of three-dimensional models, as above, and be able to recreate the model when given another person’s drawings of it. Models may be built with interlocking cubes, plasticine, connecting geometric shapes or other materials, e.g.toothpicks and plasticine.
Click to download a PDF of second-tier material relating to Level 3 Shape (95KB)
