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**Scheme of work: Key Stage 3: Year 8: Term 2: Area of 2D and 3D Shapes**

- Derive and apply formulae to calculate and solve problems involving: the perimeter and area of triangles, parallelograms, trapezia, the volume of cuboids (including cubes) and other prisms
- Calculate and solve problems involving: perimeters of 2-D shapes and composite shapes.

- The area of a triangle is the product of its perpendicular height and base divided by two. Students often forget to divide by two.
- To find the area of a composite shapes students should break it down into its individual components.
- When identifying individual components of a composite shape students tend to look for triangles and rectangles rather than trapezia and parallelograms.
- To find the surface of a cube or cuboid students could draw the net and work out the composite area.
- More able students could derive the formula for the surface are of a cuboid.

- Develop fluency
- Use language and properties precisely to analyse 2-D and 3-D shapes

- Reason mathematically
- Begin to reason deductively in geometry,

- Solve problems
- Select appropriate concepts, methods and techniques to apply to unfamiliar and non-routine problems.

- Shape
- Derive and apply formulae to calculate and solve problems involving: the perimeter and area of triangles, parallelograms, trapezia, the volume of cuboids (including cubes) and other prisms.
- Calculate and solve problems involving: perimeters of 2-D shapes and composite shapes.

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