1. Perimeter & Area
Calculate the area of quadrilaterals. Quadrilaterals include spares, rectangles, rhombuses, parallelograms, trapezoids and kites. When formulas are used, by able to explain why they are valid.

2. I can…
Use formulas to calculate the perimeter of rectangles and squares
Use formulas to calculate the area of rectangles and squares
Use formulas to calculate the perimeter and area of composite shapes made of rectangles and squares
Self Assessment
5- I can do it without help & teach others.
4- I can do this with no help, but I don’t know if I can explain it.
3- I can do this with a little help.
2- I can do this with a lot of help!
1- I don’t have a clue.

3. Perimeter distance around a shape
length
width
width
Perimeter of a RECTANGLE
Pr = 2(length) + 2(width)
Pr = 2l + 2w
This is the same as adding up all of the sides!
P = l+l+w+w
length

4. Perimeter Find the Perimeter….
Remember: You MUST write the Formula
Pr = 2(length) + 2(width)
Pr = 2(9) + 2(5)
Pr =
Pr = 28 m 9m 5m 5m 9m
Don’t forget your label

5. Don’t forget your label
Draw a picture and write down the formula
Your Turn… Find the Perimeter of a rectangle with a length of 20 in and a width of 12 in
Pr = 2(length) + 2(width) Pr = 2(20) + 2(12) Pr = Pr = 64 in
20 in
12 in
12 in
20 in
Don’t forget your label

6. AREA the amount of surface the figure covered, measured in square units
Area of a RECTANGLE
Ar = length • width
Ar = l • w
width
length

7. Don’t forget your label
ARea Find the ARea….
Remember: You MUST write the Formula
Ar = l • w
Ar = 9 • 5
Ar = 45 in2
9in
5in
5in
9in
Don’t forget your label

8. Don’t forget your label
Draw a picture and write down the formula
Your Turn… Find the Area of a rectangle with a length of 200 cm and a width of 100 cm
Ar = l • w Ar = 200 • 100 Ar = 20,000 cm2
100 cm
200 cm
Don’t forget your label

9. Perimeter distance around a shape
Side 3
Side 4
Side 2
Perimeter of a SQUARE
Ps = 4(side)
Ps = 4s
This is the same as adding up all of the sides!
P = l+l+w+w
Side 1

10. Perimeter Find the Perimeter….
Remember: You MUST write the Formula
Ps = 4(side)
Ps = 4(60)
Ps = 240 ft
60 ft
60 ft
Don’t forget your label

11. Don’t forget your label
Draw a picture and write down the formula
Your Turn… Find the Perimeter of a rectangle with a length of 12 in and a width of 12 in
Ps = 4(side) Ps = 4(12) Ps = 48 ft
12 ft
12 ft
Don’t forget your label

12. AREA the amount of surface the figure covered, measured in square units
Area of a SQUARE
As = side • side
As = s2
side
side

13. Don’t forget your label
ARea Find the ARea….
Remember: You MUST write the Formula
As = s2
As = 602
As = (60)(60)
As = 3,600 ft2
60 ft
60 ft
Don’t forget your label

14. Don’t forget your label
Draw a picture and write down the formula
Your turn Find the Area of a rectangle with a length of 11 cm and a width of 11 cm
As = s2 As = 112 As = (11)(11) As = 121 ft2
11 cm
11 cm
Don’t forget your label

15. Unknown dimensions write, substitute, and solve an equation
Draw a picture and write down the formula
Its area is 195 m2 and its length is 15 m. What is the width? Ar = length • width 195 = 15• w w = 13 m w
15 m

16. AREA of Composite Shapes
Divide the shape into rectangles or squares
Find the area of each new shape
Add areas
Ap = 3•2
Ap = 6 ft2
Ao = 3•5
Ao = 15 ft2
3 ft
At= = 21 ft2

17. I can…
Use formulas to calculate the perimeter of rectangles and squares
Use formulas to calculate the area of rectangles and squares
Use formulas to calculate the perimeter and area of composite shapes made of rectangles and squares
Self Assessment
5- I can do it without help & teach others.
4- I can do this with no help, but I don’t know if I can explain it.
3- I can do this with a little help.
2- I can do this with a lot of help!
1- I don’t have a clue.

18. in your math notebook Daily Check 2.2
Find the Perimeter and Area of each.
A room that is 15 feet by 15 feet
A rectangle that is 34 meters by 21 meters
Tell whether to use perimeter or area to decide how much to buy.
Tiles to cover a floor
Foam strip to insulate window
Find the missing length.
Area of a rectangle = 54 in2, width = 9 in., length = ?
Perimeter of a rectangle = 80 cm, width = 15cm, length = ?