Answer:
The total area of the shape is 600 square centimetres.
Step-by-step explanation:
You can solve this by finding the area of the square and the triangle separately.
The area of any rectangle, including squares, is width times height. The bottom square then has an area of 20cm × 20cm, which equals 400cm²
The area of a triangle is have of its base width times its height. It too has a width of 20cm and a height of 20cm, so its area is 20cm × 20cm ÷ 2, which equals 200cm²
Add them together for the full area of the shape:
400cm² + 200cm² = 600cm²
