8. Measurement

Lesson

Let's try this problem to review how to compare the area of shapes.

Which shape has the smallest area?

A

B

Worked Solution

Idea summary

When comparing areas of shapes, the shape that takes up less space is the smallest.

We can measure area in shapes such as squares and rectangles, but what about different shapes?

To help us measure the area of shapes like the ones pictured below, we can use square units.

In this video, we look at how to calculate the area of shapes similar to those in the picture shown.

Find the area of the shape by counting the number of grid squares it covers.

Each grid square represents 1 square unit.

Worked Solution

Idea summary

To find the area of a shape on a grid, we can count the number of unit squares inside the shape.

Sometimes we have unusual shapes but we can still work out the area of these shapes by counting the number of square units inside. We can also work out the area of triangles.

Find the area of the shape by counting the number of grid squares it covers.

Each grid square represents 1 square unit.

Worked Solution

Idea summary

We can combine half square units inside a shape to make whole square units in order to find the area.

This video shows us how unit squares can help us find the area of a shape.

Find the area of the shape below.

Worked Solution

Idea summary

To find the amount of space a shape takes up, we can use a unit square.

measures, records, compares and estimates areas using square centimetres and square metres