Area Edexcel Foundation

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Exam code:1MA1

Area

What is area?

Area is the amount of space within the perimeter of a 2D shape
- For example, the size of a sports field
Area is calculated using lengths in two dimensions
- Units of measure include mm², cm², m² etc

How do I find the area of a shape on a square grid?

Count the total number of whole squares inside the shape
- You can shade or mark the squares you have counted so far
Parts of the shape may not contain whole squares
- Pair up half squares, or parts of squares, to form whole ones
There will be a scale telling you how much area one square represents
- Multiply the number of squares you have counted by this value to find the total area of the shape

Examiner Tips and Tricks

When counting squares, write down your running total so far in each box.
- This saves time and ensures you do not count any squares twice.

Worked Example

Work out the area of the shaded quadrilateral shown on the grid below. Each square on the grid represents 1 cm².

Count the number of whole squares, keeping track of which you have counted so far

Count the partially shaded squares
Try to pair-up fractions of the squares to make whole squares

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There are 14 whole squares in total, and the shape was drawn on a 1 cm² grid

Total Area is 14 cm²

Area formulas

Which area formulae do I need to know?

Area formulae for rectangle, triangle, trapezium and parallelogram

How do I find the area of a rectangle?

The area, A, of a rectangle of length, l, and width, w, using the formula
- $A equals l cross times w$
  - Multiply together the length and the width

How do I find the area of a triangle?

The area, A, of a triangle with base, b, and length, l, can be found using the formula
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Maths Gcse Edexcel Foundation