Calculating missing side lengths from the area of composite rectilinear shapes | Maths

Starter quiz

Calculate the area of this compound rectilinear shape (you do not need to state the units).
- '54' ✓
Calculate the area of this compound rectilinear shape (you do not need to state the units).
- '48' ✓
Calculate the area of this compound rectilinear shape (you do not need to state the units).
- '100' ✓
Calculate the area of this compound rectilinear shape (you do not need to state the units).
- '136' ✓
Determine whether there is enough information to find the perimeter of this shape.
- There is enough information
- There is not enough information ✓
Calculate the area of this compound rectilinear shape (you do not need to state the units).
- '132' ✓

Calculate the length of the marked side.
- '7 ' ✓
Calculate the length of the marked side.
- '10' ✓
Calculate the length of the marked side.
- '12' ✓
Calculate the length of the marked side.
- '6' ✓
Is it possible to determine the perimeter of this shape?
- Yes
- No ✓
True or false? This is an example of a composite rectilinear shape.
- True
- False ✓

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Pupils may try to combine lengths that are not parallel to a known side length.

For two sets of side lengths to be equal, one set must be parallel to the other and none of the lengths can overlap.

Composite rectilinear shape - A composite rectilinear shape is a composite shape made from rectangles.