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MathsYear 5Autumn Block 5 (Perimeter and Area)01 Measure Perimeter › Free Measure Perimeter Year 5 Perimeter and Area Learning Video Clip

# Free Measure Perimeter Year 5 Perimeter and Area Learning Video Clip ## Step 1: Free Measure Perimeter Year 5 Perimeter and Area Learning Video Clip

Alfie, his Auntie Sharon and Uncle Paul are moving to a new house. They need help measuring and finding the perimeter of a letterbox and house number using whole and half centimetres. The family also need to decide on the design of a new tiled bathroom wall using different tiles to meet the perimeter requirements.

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1. The length of the letter box is 23cm. Is Uncle Paul correct? Explain.
Discuss the method of measurement and the correct way to measure using tape measures and rulers. Discuss the units of measurement visible.
Uncle Paul is incorrect because he has started measuring from 1cm instead of 0cm. The length is 22cm.

2. What other strategy could Uncle Paul use to calculate the perimeter?
Discuss different ways of finding the perimeter of a shape: for instance measuring each side and adding them all up or by using (l + w) x 2 if appropriate.
Uncle Paul is partially correct. This is because he could measure all four sides and add them to find a total or he can multiply the length and width by two as the shape is symmetrical.

3. Using the measurements you have so far, work out the perimeter of the letter box.
Discuss accurate measuring and possible strategies for efficient calculation, such as adding all four sides together or using (l + w) x 2.
The perimeter of the letter box is 57cm.

4. Help Alfie calculate the perimeter.
Discuss how the measurement of each side can be calculated. Discuss the use of accurate measuring.
The perimeter is 24cm.

5. What design could Auntie Sharon have on her bathroom wall using these tiles?
Discuss the measurement of a single tile and how multiple tiles will need to be used to create a design. This question is open-ended for children to explore.
Various answers, for example: The below design has a total perimeter of 40cm. 6. What could the design look like with these tiles?
Discuss the measurement of a single tile and how multiple tiles will need to be used to create a design. This question is open-ended for children to explore.
Various answers, for example: The below design has a perimeter of 37.5cm. National Curriculum Objectives

Mathematics Year 5: (5M7a) Measure and calculate the perimeter of composite rectilinear shapes in centimetres and metres

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