Year 7 - Maths
Securing understanding of perimeter and area
Perimeter and area
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils investigate how to calculate the area and perimeter of rectilinear shapes, and composite shapes using rectangles and triangles. They will also derive simple area formulae.
Lesson Summary
You will learn to find the perimeter and area of basic shapes.
Key Notes
- You can calculate the area and perimeter of rectangles.
- Different rectangles can have the same perimeter.
- The area of a parallelogram can be deduced from the area of a rectangle.
- The base and perpendicular height of parallelograms can be identified.
- The area of any parallelogram can be calculated.
Vocabulary To Learn
- Parallelogram: A parallelogram is a quadrilateral with two pairs of parallel and equal sides.
- Area: The area is the size of the surface and states the number of unit squares needed to completely cover that surface.
- Perimeter: The perimeter is the distance around a 2D shape.
Common Mistakes To Avoid
- Pupils may confuse perimeter and area.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
You can calculate the area and perimeter of rectangles. Different rectangles can have the same perimeter.
2. Use this key word in a maths sentence and explain it clearly. 'Parallelogram'
A parallelogram is a quadrilateral with two pairs of parallel and equal sides. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may confuse perimeter and area. Correction: Perimeter is the distance around a 2D shape. Area is the size of the surface.
More Lessons In This Unit
- Area of a trapezium Study Guide
- Area of a triangle Study Guide
- Area of composite rectilinear shapes Study Guide
- Calculating missing lengths with perimeter of polygons Study Guide
- Calculating missing side lengths from the area of a trapezium Study Guide
- Calculating missing side lengths from the area of composite rectilinear shapes Study Guide
- Checking understanding of perimeter and area Study Guide
- Finding the perimeter of polygons Study Guide
- Perimeter with composite rectilinear shapes Study Guide
- Problem solving with perimeter and area Study Guide
- Using the formula for the area of a triangle Study Guide
Browse all guides in the Year 7 Maths guide library.