Starter quiz
- What is the inverse of × 4?
- + 4
- − 4
- ÷ 4 ✓
- × 8
-
- Which of these are factors of 12?
- 3 ✓
- 5
- 6 ✓
- 24
- 60
-
What is the perimeter of this shape? Remember to use the correct unit of measure.- '130 mm' ✓
- A square has side lengths of 75 mm. What is its perimeter? ______ mm
- '300' ✓
- A rectangle has side lengths of 17 cm and 4 cm. Its area is ______ cm².
- '68' ✓
What is the area of this square? ______ cm²- '49' ✓
Exit quiz
This square road sign has a perimeter of 120 cm. What is the length of one side? ______ cm- '30' ✓
What is the missing dimension of the rectangle which has an area of 104 cm² and one known side of 8 cm? ______ cm- '13' ✓
The smaller rectangle has sides of 7 cm and 3 cm. The larger rectangle is composed of two of the smaller rectangles. What is the perimeter of the larger rectangle? Remember to use the correct unit.- '34 cm' ✓
The square has an area of 64 cm². It is decomposed into four congruent rectangles. What is the perimeter of one of the small rectangles? Remember to use the correct unit.- '20 cm' ✓
The larger rectangle is composed of two of the smaller rectangles. What is the area of the larger rectangle? ______ cm²- '42' ✓
The larger rectangle is composed of the smaller rectangles. What is the area of the larger rectangle? ______ cm²- '72' ✓
Worksheet
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Presentation
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Lesson Details
Key learning points
- Area and perimeter are calculated from the side lengths of 2D shapes.
- Area is measured in square units.
- Perimeter is measured in units of length.
Common misconception
Area and perimeter are easily confused. In this lesson, both concepts are explored, often at the same time.
Use your knowledge of the pupils' attainment (including using the Starter Quiz) to see which pupils are confusing the terms. All pupils will benefit from access to a working wall which gives a clear reminder of which is which.
Keywords
Area - Area is the measurement of a flat surface and measures 2D space.
Perimeter - The distance around a 2D shape is its perimeter.
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