1. Problem Solving Kristie Ferrentino EDU 314 Dr. Pane Ninth Grade (Algebra I) Kristie Ferrentino EDU 314 Dr. Pane Ninth Grade (Algebra I)

2. Admit Ticket Solve for perimeter of the following figures. Solve for area of the following figures. Solve for perimeter of the following figures. Solve for area of the following figures. 33 5 A.8 8 8 8 8 B. 12 C. 6 4 A. 8 5 B.

3. Aim Students will be able to solve Area and Perimeter Word Problems by using the Four Step Problem Solving Process.

4. Writing an Equation Perimeter: The distance around a geometric figure –Add the lengths of the sides Area: The measure of the surface enclosed by a geometric figure – Length x Width Perimeter: The distance around a geometric figure –Add the lengths of the sides Area: The measure of the surface enclosed by a geometric figure – Length x Width

5. Example 1 Question: A farmer has a rectangular field that is 200 feet longer than it is wide. The perimeter of the field is 4000 feet. If w represents the width of the field, what expression represents the length of the field? What are the dimensions of the field when the perimeter is 4000 feet? Question: A farmer has a rectangular field that is 200 feet longer than it is wide. The perimeter of the field is 4000 feet. If w represents the width of the field, what expression represents the length of the field? What are the dimensions of the field when the perimeter is 4000 feet?

6. Step 1: Understand the Problem Read the problem carefully. Ask yourself questions like: –What is the question asking you to do? –What do you need to find out? –What are the facts that you already know?

7. Step 2: Devise a Plan Set a plan to solve the problem –How could we solve this problem?

8. Step 3: Carry out the Plan Solve the equation that was created in step 2 Carry out the plan you made

9. Step 4: Check Your Work Check that your answer is reasonable Ask yourself questions –Does my answer make sense for the problem?

10. Example 2: Question: If the area of a rectangle is 30 square centimeters and the length is 6 centimeters, use the equation 30=6w to find the width w of the rectangle. Question: If the area of a rectangle is 30 square centimeters and the length is 6 centimeters, use the equation 30=6w to find the width w of the rectangle. Step 1: Understanding the problem Step 2: Devising a plan Step 3: Carrying out the plan Step 4: Checking your work

11. Practice Problems Complete the first three problems from the worksheet independently.

12. What did we learn today? What is the four step problem solving process?