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**Scheme of work: Key Stage 3: Year 7: Term 3: Perimeter Area and Volume**

- measure and calculate the perimeter of composite rectilinear shapes in centimetres and metres
- calculate and compare the area of rectangles (including squares), and including using standard units, square centimetres (cm
^{2}) and square metres (m^{2}) and estimate the area of irregular shapes - estimate volume [for example, using 1 cm
^{3}blocks to build cuboids (including cubes)] and capacity [for example, using water] - recognise that shapes with the same areas can have different perimeters and vice versa
- recognise when it is possible to use formulae for area and volume of shapes

- The perimeter of a shape is the distance around the outside. It is measured in units such as centimetres, millimetres, inches, feet, and metres.
- The area of a shape is a measure of how much space there is on the surface. Area is measured in square units, written for example as cm
^{2}. - To find the area of a composite shape it is easier to split the shapes into distinct rectangles and find the sum of each area.
- The area of a triangle can be found as half the area of a rectangle.
- The volume of a shape is the space contained inside it. Volume is measured in cube units, written for example as cm
^{3}.

- 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: perimeter and area of triangles, parallelograms, trapezia, 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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