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Explore calculating areas of rectangles, triangles, parallelograms, and trapeziums. Understand relationships between shapes and their areas. Practice measuring and solving geometric problems.
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8cm 2cm Rectangles How many squares do you need to fill the rectangle? Area of a rectangle = Length x Width
6cm 3cm What is the area of the rectangle? Triangles What shape is created when I cut the rectangle in half?
3cm 6cm Triangles What is the area of the triangle?
Is the area of the triangle still half the area of the rectangle? Triangles
Find the area of these triangles 3cm 12cm2 Triangles 8cm Can you think of some more triangles with the same area? 4cm 12cm2 6cm
What is the name of this shape? How can you find the area of this shape? Parallelogram
What is the area of this parallelogram? 4cm 5cm 50cm2 10cm Parallelogram What is the height of this parallelogram? 60cm2 ? 12cm 5cm
a b h h b a If I stick two trapeziums together, what shape do I get? Trapezium How do I find the area of the two shapes together? How do I find the area of just one trapezium? Area of a trapezium = (a+b)h 2