The document discusses perimeter and area, defining perimeter as the distance all the way around a figure and area as the number of square units needed to cover a surface. It provides formulas for calculating the perimeter and area of squares and rectangles. The perimeter of a square is calculated as P = 4s and the area as A = s^2. For a rectangle, the perimeter formula is P = 2w + 2l and the area formula is A = lw.

1. PERIMETER & AREA Defining and calculating

2. When your family puts up a new fence around your home, how will they know how much fencing they need? PERIMETER

3. Perimeter The perimeter of a figure is the distance all the way around the figure.

4. Perimeter The perimeter is found by adding the lengths of the sides together.

5. Find the perimeter of the figures. A. B. D. C. P = 24 m P = 21 cm P = 39 mm P = 26 in.

6. Perimeter of a Square A square is a figure with 4 equal sides. The perimeter can be found by adding all 4 sides together. It can also be found by multiplying the side length by 4. So the formula for the perimeter of a square is: P = 4s

7. Find the perimeter of the squares using the formula P = 4s . A. B. D. C. P = 36 m P = 28 in. P = 44 mm P = 20 cm

8. Perimeter of a Rectangle A rectangle is a figure with 4 sides. Opposite sides are equal. The perimeter can be found by adding all 4 sides together. It can also be found by adding twice the width together with twice the length. So the formula for the perimeter of a rectangle is: P = 2 w + 2 l

9. Find the perimeter of the rectangles using the formula P = 2 w + 2 l . A. B. D. C. P = 30 cm P = 28 m P = 54 mm P = 28 in.

10. If your parents want to put new carpet in your room, how will they know how much carpet to buy? AREA

11. Area The area of a figure is the number of square units that cover the surface of the closed figure.

12. Area A square unit is a unit that has 4 equal sides. For metric units, we say “units squared”. Ex: centimeters squared or cm 2 For U.S. Customary, we say “square units” Ex: square inches or sq. in.

13. Area The area of a figure is found by finding how many square units it takes to cover its surface.

14. Find the area of the figures. A. B. D. C. A = 16 sq. units A = 27 sq. units A = 30 sq. units A = 8 sq. units

15. Area of a Square The area of a square is found by finding how many square units it takes to cover its surface. It can also be found by multiplying its side length by its side length. Multiplying a number by itself is also called “squaring it”. So the formula for the area of a square is: A = s x s or A = s 2

16. Find the area of the squares using the formula A = s 2 . A. B. D. C. A = 16 cm 2 A = 25 sq. in. A = 49 m 2 A = 81 sq. ft.

17. Area of a Rectangle The area of a rectangle is found by finding how many square units it takes to cover its surface. It can also be found by multiplying its length by its width. So the formula for the area of a rectangle is: A = l x w

18. Find the area of the rectangles using the formula A = l x w . A. B. D. C. A = 24 cm 2 A = 77 sq. in. A = 140 mm 2 A = 48 sq. ft.

19. Check for understanding. Find the perimeter & area of the figure. The perimeter is the distance ____ _______________________. P = _____ The area is the number of _____ ____ it takes to cover its ______. A = _____ all the way around a figure square units surface 28 m 48 m 2