KS2 Maths Quiz
Perimeter and Area (Year 4)
Do you know what would be a suitable unit to measure the area of a classroom?

Perimeter and Area (Year 4)

In KS2 Maths children will come to understand both perimeter and area. In Year Four children will learn how to work out the perimeter of a square or a rectangle and how to calculate the length of the sides in a square from its perimeter. They will also be introduced to the correct units to use (mm2 cm2 or m2) when measuring area and asked to make realistic estimates of a shape's area.

When measuring a 2D shape, like a square or a rectangle, it is useful to know what the perimeter and area of a shape are. The perimeter is the total distance around the outside of a two-dimensional shape. Area is the amount of space covered by the shape's surface. To work out the area of a rectangle multiply the length of its longest side by the length of its shortest side. This will give you an answer in square mm, cm or m (mm2 cm2 or m2).

Take this quiz for 8-9 year olds to discover what you know about area and perimeter.

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  1. What is area?
    Area is measured in square mm cm m or km
  2. How is square centimetre usually written?
    Cubed cm are written as cm3
  3. Which would be a suitable unit to measure the area of a classroom?
    Millimetres and centimetres would be way too small and kilograms measure weight!
  4. What is useful to work out the area of a small 2D shape?
    Squared paper helps to work out the area of irregular shapes too
  5. What is the perimeter of a rectangle 5cm x 9cm?
    A rectangle has two sides of equal length and two more side with equal length. So the answer is:
    (2 x 5) + (2 x 9) which is
    10 + 18 = 28
  6. Which is a good estimate of the perimeter of a mobile 'phone?
    100cm = 1m That's way too big for a 'phone!
  7. What is the perimeter of a 6cm square?
    A square has four equal sides, therefore the perimeter will be 4 x 6 = 24
  8. What is a perimeter?
    To calculate the perimeter of a 2D shape, add together the length of each side
  9. A square has a perimeter of 32cm. How long are the sides?
    As a square has four equal sides, we divide by 4 to get the answer
  10. Which would be a good estimate of the area of a small notebook?
    This would be a very small notebook measuring 4cm x 6.5cm

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