TLF ID L383
Find the area of compound shapes based on rectangles on a grid. Explore how the formula works for finding a rectangle's area. First, estimate the area of a compound shape based on rectangles on a grid. Second, work out the correct formula for finding area by placing rows and columns of squares inside two rectangles. Then, compare the actual area of the original shape with your first estimate. Practise applying the formula directly to a range of compound shapes based on rectangles. This learning object is the last in a series of two objects that progressively increase in difficulty.