Areas of Composite Shapes

11-17 A landscaper will be installing sod (rolls or rectangles of grass growing in soil) in a customer's back yard and needs to know how many square feet of sod to purchase. The yard is irregularly shaped (i.e. not a rectangle), and it has a circular water feature in the middle. The lawn in the diagram below is represented by the shaded area. The dimensions of lawn layout are labeled and measured in feet. Find the area of the yard to be sodded. Show your calculations and solution clearly.

11-18 The shape below is composed of a rectangle and a semi-circle. 

a. What is the perimeter of the shape? Show your calculations. 

b. What is the area of the shape? Show your calculations.

11-19 All the angles in the template below are right angles. 

a. What is the perimeter of the template? Show your calculations. 

b. What is the area of the template? Show your calculations.

 11-20 

a. What is the perimeter of the template? Show your calculations. 

b. What is the area of the template? Show your calculations.