Area and Perimeter Problem Solving
Grade 4 Mathematics Understanding shapes and measurements Real-world problem solving
I Can Statements - Our Learning Goals
I can calculate the perimeter by adding all side lengths I can find the area using multiplication I can solve real-world problems with area and perimeter I can choose the right measurement for different situations
Perimeter Walk Challenge
Walk around the edge of your desk Count each step as you go around How many steps did it take? This distance around is called PERIMETER!
What is Perimeter?
Perimeter = distance around the outside of a shape Add up ALL the side lengths Like walking around a fence Measured in units: inches, feet, centimeters
Perimeter vs Area - What's the Difference?
{"left":"PERIMETER: Distance AROUND the shape\nAdd all the sides together\nLike putting a fence around your yard","right":"AREA: Space INSIDE the shape\nLength × Width for rectangles\nLike covering your floor with carpet"}
Grid Paper Area Discovery
Count the squares inside each rectangle Try: 3 squares long × 4 squares wide Count them: 1, 2, 3... 12 squares total! Shortcut: 3 × 4 = 12 square units
Real-World Problem Challenge
Sarah wants to put a border around her rectangular poster The poster is 8 inches long and 5 inches wide How much border material does she need? Think: Do we need PERIMETER or AREA?
Success Strategies for Area and Perimeter
Read the problem carefully - what are we measuring? Draw a picture to visualize the problem Label your rectangle with the given measurements Choose: Perimeter (around) or Area (inside)? Check your answer - does it make sense?