This free resource provides a comprehensive reference sheet for calculating the area of 2D shapes. It’s ideal for Year Groups 7, 8, and 9 and can be used as a classroom poster, revision aid, or homework support tool.
How to Calculate the Area of Shapes
- Square: The formula for the area of a square is Base × Height. Each side of a square is of equal length, so multiplying two sides provides the area.
- Rectangle: For a rectangle, the formula is also Base × Height, where the base is the length and the height is the width of the rectangle.
- Triangle: The area of a triangle is calculated using the formula: (Base × Perpendicular Height) ÷ 2. This method applies to any triangle, provided the height is perpendicular to the base.
- Trapezium: The formula for the area of a trapezium is ((a + b) × Height) ÷ 2, where 'a' and 'b' are the lengths of the two parallel sides, and the height is the perpendicular distance between them.
- Parallelogram: For a parallelogram, the area is found using Base × Perpendicular Height. The height must be perpendicular to the base for this formula to work.
- Rhombus: The formula to calculate the area of a rhombus is (Length × Height) ÷ 2, where the height is perpendicular to the length.
- Kite: The area of a kite is determined using the formula (Length × Height) ÷ 2, where the height is the perpendicular distance between the two diagonals.
Why Use This Formula Sheet?
- Quick Reference: Saves time in lessons by providing instant access to key formulas.
- Supports Learning: Simplifies complex calculations with clear, visual examples.
- Versatile Use: Perfect for lessons, homework, or revision sessions.
Who Is This For?
- Teachers: A helpful visual aid for explaining area calculations.
- Students: Great for building confidence in geometry and problem-solving skills.
- Parents: A useful guide for supporting homework and revision at home.
Benefits for Learners
- Enhances understanding of geometry concepts.
- Improves problem-solving and analytical skills.
- Builds a strong foundation in 2D shape calculations.
