1. Calculating Perimeter and Area Gateway – Unit 7 – Green Architecture
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2. Calculating Perimeter and Area
GTT – Green Architecture
Unit 7 – Lesson 7.2 – Architectural Basics
Perimeter
What is a Perimeter?
The sum of all the sides of a shape (S1+S2+S3+S4+…)
For a Rectangle: P = 2 (H + W)
P = Perimeter, H = Height, W = Width
W = Width
H = Height

3. What Is the Perimeter? 3” 2”
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
What Is the Perimeter?
A rectangle has a width of 3” and a height of 2”. What is the perimeter of the rectangle? 3” 2”
P = 2 (H + W)
P = 2 (2”+3”)
P = 10”

4. What Is the Perimeter? 6’- 6” 4’-0”
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
What Is the Perimeter?
A rectangle has a width of 6’- 6” and a height of 4’-0”. What is the perimeter of the rectangle?
6’- 6”
Convert 6’-6” to decimal feet
6’-6” = 6 ft + 6 in. × 1 ft 12 in.
= 6.5 ft
4’-0”
P = 2 (H + W)
P = 2 (4’+6.5’)
P = 21’

5. What Is the Perimeter? 8’ - 4” 4’ - 3”
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
What Is the Perimeter?
A rectangle has a width of 8’-4” and a height of 4’-3”. What is the perimeter of the rectangle?
8’ - 4”
Convert to decimal feet
8’-4” = 8 ft in.× 1 ft 12 in.
= 8.33 ft
4’-3” = 4 ft in.× 1 ft 12 in.
= 4.25 ft
4’ - 3”
P = 2 (H + W)
P = 2 (4.25’+8.33’)
P = 25.16’

6. Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
Perimeter
How would you determine the perimeter of this shape? 3” 3” 2” 6” 3” 5”

7. Perimeter 2’-3” 3’-3” 2’-2” 6’-6” 3’-3” 5’-5”
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
Perimeter
Calculate the perimeter of this shape?
2’-3”
3’-3”
2’-2”
6’-6”
3’-3”
5’-5”

8. Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
Area
What is Area?
A two-dimensional surface enclosed within a specified boundary or geometric figure
A = (H x W)
A = Area, H = Height, W = Width
W = Width
H = Height

9. Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
What Is the Area?
A rectangle has a width of 3 inches and a height of 2 inches. What is the area of the rectangle? 3” 2”
A = H x W
A = 2” x 3”
A = 6 sq. in.

10. Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
What Is the Area?
A rectangle has a width of 6’ – 6” and a height of 4’. What is the area of the rectangle?
6’- 6”
4’-0”
Convert 6” to decimal feet.
A = H x W
A = 4’ x 6.5’
A = 26 sq. ft.

11. Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
What Is the Area?
A rectangle has a width of 8’-4” and a height of 4’-3”. What is the area of the rectangle?
8’-4”
4’-3”
Round to hundreds place.
A = H x W
A = 4.25’ x 8.33’
A = sq. ft.

12. Area 3” 3” 2” 6” 3” 5” How would you determine the area of this shape?
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
Area
How would you determine the area of this shape? 3” 3” 2” 6”
Teach both of the following ways to calculate area:
Find area of large rectangle 5 x 6 = 30 sq in. Then subtract the small rectangle 2 x 3 = 6 sq in. Therefore 30 – 6 = 24 sq. in.
Find area of two smaller rectangles and add together. 3 x 5 = 15 sq in. + 3 x 3 = 9 sq in. Therefore = 24 sq in. 3” 5”

13. Area 3’-6” 3’-6” 2’ 6’-6” 3’ 5’-6” Find the area of this shape?
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
Area
Find the area of this shape?
3’-6”
3’-6” 2’
6’-6”
Teach both of the following ways to calculate area:
Find area of large rectangle 5 x 6 = 30 sq in. Then subtract the small rectangle 2 x 3 = 6 sq in. Therefore 30 – 6 = 24 sq. in.
Find area of two smaller rectangles and add together. 3 x 5 = 15 sq in. + 3 x 3 = 9 sq in. Therefore = 24 sq in. 3’
5’-6”

14. Find the Area and Perimeter
You need to buy floor board trim and carpet for your bedroom. How much of each do you need? The door opening is 3’ - 0” wide. 1’ 3’
10’

15. Find the Area and Perimeter
Floor Trim = Perimeter
P = S1+S2+S3+S4
P = 14’+(14’-3’)+10’+10’
P = 45 ft floor trim 1’ 3’
10’

16. Find the Area and Perimeter
Carpet = Area
A = H x W
A = 14’ x 10’
A = 140 sq. ft. carpet 1’ 3’
10’