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Year 11 Foundation · Area and volume
Draw a solid shape on isometric paper
Definition
Area is the amount of flat space inside a shape. We measure it by counting the unit squares that fit inside; for a rectangle, area = width × height.
Why Do I Have to Learn This?
Area measures how much surface a shape covers. It tells you how much paint, carpet or wrapping paper you need.
Key Rules:
- 1. Area is measured in square units, such as cm².
- 2. Area of a rectangle = width × height; area of a triangle = ½ × base × height.
- 3. Split awkward shapes into rectangles and add the areas.
Remember:
- •Area is the inside of the shape, perimeter is the border.
- •Use the perpendicular height for a triangle, not the slanted side.
- •Keep units the same before calculating.
Area
The amount of surface a flat shape covers. For a rectangle, area = length × width.
A rectangle 4 cm by 3 cm has an area of 12 cm².
Animated Example:
5 × 3 = 15 squares
Free Draw a solid shape on isometric paper Worksheet
Download free worksheets and practise today.
Every download has a fresh set of questions.
Before this: Perimeter, area and volume (Year 10 Foundation)
Let’s Practise the Concept
Step 1 of 3
Sort the shapes
Drag each shape into the right group.
Flat (2-D)
Drop them here
Solid (3-D)
Drop them here