The lesson teaches students how to calculate the perimeter and area of different objects. It defines perimeter as the distance around an object found by adding up all the sides, and area as the surface measurement found by multiplying length by width. Students are instructed to measure their textbook, desk, and a room to practice finding the perimeter and area.

1. Lesson 8
Obj: The student will solve problems
involving perimeter and area.

2. Notes
 Perimeter = distance around an object (add up
sides)
 Area = surface measurement (length x width)
 Ex. 5 in
4
in
Perimeter = 18 inches
around
Area = 20 square inches

3. Your Turn
 Use a ruler to measure your text book.
 Find each side.
 Find the perimeter.
 Find the area.
 Use a ruler to measure your desk.
 Find each side.
 Find the perimeter.
 Find the area.

4. Let’s Measure!
 Choose a room to carpet.
 Use the tape measure to measure the sides.
 Find the perimeter.
 Find the area.