So you multiply 8 and four to give you 32 which is the area of the rectangle, subtract the top measurement of 7 by 4 to give you 3 which will make it simpler to find the area of the square and triangle. To find the area of the square multiply 3 by 3 to get 9. And to find the triangle since we know that 8 minus 3 is 5 and to find the area of a triangle we have to divide by two at the end 5x3 divided by 2 will give you the answer of 7.5. To find the total area do 32+9+7.5
to get 48.5cm squared