3D Shapes

Properties of Solids

Net Drawings

Isometric Drawings

Elevation Drawings

Isometric and Elevation Drawings of 3D Shapes

Prerequisite Knowledge

• draw 2-D shapes and make 3-D shapes using modelling materials; recognise 3-D shapes in different orientations and describe them
• recognise angles as a property of shape or a description of a turn
• compare and classify geometric shapes, including quadrilaterals and triangles, based on their properties and sizes
• identify acute and obtuse angles and compare and order angles up to two right angles by size
• identify lines of symmetry in 2-D shapes presented in different orientations

Success Criteria

• use conventional terms and notations: points, lines, vertices, edges, planes, parallel lines, perpendicular lines, right angles, polygons, regular polygons and polygons with reflection and/or
• rotation symmetries; use the standard conventions for labelling and referring to the sides and angles of triangles; draw diagrams from written description
• identify properties of the faces, surfaces, edges and vertices of: cubes, cuboids, prisms, cylinders, pyramids, cones and spheres
• construct and interpret plans and elevations of 3D shapes.

Key Concepts

• Understanding and applying the keywords is essential throughout this topic.
• Students need to understand the geometrical difference between a prism and pyramid.
• Horizontal lines are not drawn on isometric paper.

Common Misconceptions

• Students often get confused which elevation to draw and how to include hidden detail.
• Some students find it very difficult to draw 3D shapes on isometric paper.