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| Term | Definition |
|---|---|
| Perimeter of a square | side x 4, s x 4 |
| Perimeter of a rectangle | 2 x (length + width), 2 x (l + w) |
| Perimeter of a circle | π x D |
| Perimeter of a circle (alternate) | π x 2 x r |
| Perimeter | The lengths of all the sides |
| Area | The number of square units a closed shape encloses |
| Area of a square(and rectangles) | length x width, l x w |
| Area of a triangle | ½(base x height) |
| Area of a parallelogram (and rhombuses) | base x height, b x h |
| Area of a circle | π x r² |
| Area of trapeziums | A =½(a+b) x h |
A introduction/revision of the different rules used to determine perimeter and area of plane shapes