KS2 Primary Maths Age 9-13 - Area Problem: - Explained

The video tutorial explains how to find the area of a shaded triangle within a large square made up of four smaller squares. The teacher first describes the problem and then calculates the area of the large square. Next, the areas of three smaller triangles are determined. Finally, the area of the shaded triangle is found by subtracting the areas of the smaller triangles from the large square. The tutorial concludes with an explanation of the marks allocation for the problem.

What is the area of each small square in the large square?

• 0.5 cm²

• 4 cm²

• 1 cm²

• 2 cm²

What is the area of the large square that contains the shaded triangle?

• 1 cm²

• 2 cm²

• 3 cm²

• 4 cm²

How is the area of the small triangle A calculated?

• Base times height divided by two

• Base times height

• Base plus height

• Base minus height

What is the combined area of the three white triangles?

• 2.5 cm²

• 2 cm²

• 1.5 cm²

• 1 cm²

How many marks are awarded for finding the area of the three white triangles?

• Two marks

• Three marks

• No marks

• One mark