New
New
Year 5

# Explain what area is

I can explain what area is.

New
New
Year 5

# Explain what area is

I can explain what area is.

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## Lesson details

### Key learning points

1. Some shapes are better than others to cover the surface and count the area.
2. The surface of the shape must be covered with no gaps or overlaps; the unit used must tessellate.

### Common misconception

Pupils may well have had recent experience of perimeter. Perimeter and area are easily confused.

Remind pupils that running their finger around a 2D shape will give the perimeter. Running it inside the shape will give the area.

### Keywords

• Polygon - A two-dimensional shape made up of three or more straight lines.

• Tessellate - A shape tessellates if copies of it can fully cover a space without overlapping.

'Interrupt the forgetting' by giving frequent quickfire opportunities outside the Maths lesson for pupil to use their fingers to show the perimeter and then the area of an object in front of them.
Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
What shape is being described here? A flat shape with 4 straight sides of equal length. Every interior angle is a right angle (90°).
Circle
Rectangle
Equilateral triangle
Regular hexagon
Q2.
Which of these images shows a polygon?
Correct Answer: An image in a quiz
Q3.
Match the 2D shape with the correct name.

circle

pentagon

hexagon

square

Q4.
What is the perimeter of the rectangle?
6 cm
5 cm
30 cm
Q5.
What is the perimeter of the square? cm
Correct Answer: 12, 12.0, 12., twelve, Twelve
Q6.
Which of the following shapes would tessellate with itself?
a
b

## Exit quiz

### 6 Questions

Q1.
Fill in the blank: is the measurement of a flat surface. It measures a 2D space.
Q2.
Which of these shapes is most commonly used for measuring the area of a flat surface?
a
b
c
Q3.
Which of these images have an area that can be measured?
Correct Answer: An image in a quiz
Correct Answer: An image in a quiz
Correct Answer: An image in a quiz
Q4.
Which 2D shape appears on all six of the faces of this brick and has measurable area?
Correct Answer: rectangle, rectangle., Rectangle, Rectangle., a rectangle
Q5.
Complete the sentence: The shape has an area of just over square units.
Correct Answer: 15, fifteen, Fifteen, 15., 15.0
Q6.
Square units are being used to measure the area of this shape. How many complete square units can be seen in the image?
Correct Answer: 18, 18., 18.0, eighteen, Eighteen