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.

Explain how the areas of triangles B and C are determined.

What is the final area of the shaded triangle after all calculations?