1. Scale factor, scale, area, perimeter, and redrawing figures
Review Scale Factor
Scale factor, scale, area, perimeter, and redrawing figures

2. Fluency- distributive property

3. Fluency answers

4. Difference between scale and scale factor
Scale- ratio of measurements from a drawing, model, or picture to the actual measurements
can be different units like inches: feet
has to have measurement labels
Scale Factor- comparison of measurements in the SAME units
does not usually have labels!

5. Scale factor 1 find the scale factor and missing side

6. Scale factor 1 Answer
Scale factor: ½
X = 4.5 cm

7. Scale factor 2 find the scale factor and missing side

8. Scale factor 2 - answer
Scale factor: 1.5
X = 12 cm

9. A floor plan for a home is
Step-by-Step Example
SCALE AND AREA REVIEW.
A floor plan for a home is
shown at the left where inch represents 3 feet of the actual home. What is the actual area of the bathroom ?
Find the length using the scale
Find the width using the scale
Find the area using length and width
Need Another Example?

10. 0.5 𝑖𝑛 3 𝑓𝑡 = 2 𝑖𝑛 𝑥 𝑓𝑡 0.5 𝑖𝑛 3 𝑓𝑡 = 1 𝑖𝑛 𝑥 𝑓𝑡
Step-by-Step Example
AREA REVIEW.
A floor plan for a home is
shown at the left where inch represents 3 feet of the actual home. What is the actual area of the bathroom ?
Find the length using the scale
Find the width using the scale
Find the area using length and width
Length
0.5 𝑖𝑛 3 𝑓𝑡 = 2 𝑖𝑛 𝑥 𝑓𝑡
X = 12 feet
2. Width
0.5 𝑖𝑛 3 𝑓𝑡 = 1 𝑖𝑛 𝑥 𝑓𝑡
X = 3 feet
3. Area
12 x 3=
36 𝑓𝑡 2
Need Another Example?

11. Perimeter, Area, and Scale Factor
If the scale of a floor plan is ¼ inch : 1 foot, what is the area of a master bedroom that measures 8 inches in length and 7 inches in width on the floor plan
Find the length in feet
Find the width in feet
Find the area in feet

12. Perimeter, Area, and Scale Factor - Answer
If the scale of a floor plan is ¼ inch : 1 foot, what is the area of a master bedroom that measures 8 inches in length and 7 inches in width on the floor plan
Length
0.25 𝑖𝑛 1 𝑓𝑡 = 8 𝑖𝑛 𝑥 𝑓𝑡
X = 32 feet
2. Width
0.25 𝑖𝑛 1 𝑓𝑡 = 7 𝑖𝑛 𝑥 𝑓𝑡
X = 28 feet
3. Area
32 x 28 =
896 𝑓𝑡 2

13. A floor plan for a home is
Step-by-Step Example
SCALE AND PERIMETER REVIEW.
A floor plan for a home is
shown at the left where inch represents 3 feet of the actual home. What is the perimeter of the house?
Find the total length using the scale
Find the total width using the scale
Find the perimeter using length and width
Need Another Example?

14. 0.25 𝑖𝑛 1 𝑓𝑡 = 9 𝑖𝑛 𝑥 𝑓𝑡 0.5 𝑖𝑛 3 𝑓𝑡 = 2.5 𝑖𝑛 𝑥 𝑓𝑡 Length 2. Width
Step-by-Step Example
SCALE AND PERIMETER REVIEW.
A floor plan for a home is
shown at the left where inch represents 3 feet of the actual home. What is the perimeter of the house?
Find the total length using the scale
Find the total width using the scale
Find the perimeter using length and width
Length
0.25 𝑖𝑛 1 𝑓𝑡 = 9 𝑖𝑛 𝑥 𝑓𝑡
X = 36 feet
2. Width
0.5 𝑖𝑛 3 𝑓𝑡 = 𝑖𝑛 𝑥 𝑓𝑡
X = 5 feet
3. Perimeter: =
82 feet
Need Another Example?

15. Redrawing a shape with a different scale factor
2. A square garden has sides that are 15 feet in length. Using the graph on the answer document, draw a scale drawing of the garden using the scale of 3 𝑐𝑚 = 5 𝑓𝑡.
Convert the feet to cm using the scale
Redraw the square using the cm you just found!

16. Redrawing a shape with a different scale factor
2. A square garden has sides that are 15 feet in length. Using the graph on the answer document, draw a scale drawing of the garden using the scale of 3 𝑐𝑚 = 5 𝑓𝑡.
Convert the feet to cm using the scale
Redraw the square using the cm you just found!
9 cm
3 𝑐𝑚 5 𝑓𝑡 = 𝑥 𝑐𝑚 15 𝑓𝑡
X = 9 cm
9 cm

17. Redrawing a shape with a different scale factor
2. A patio has sides that are 10 feet in length and 5 feet wide. Using the graph on the answer document, draw a scale drawing of the garden using the scale of 2 𝑐𝑚 = 5 𝑓𝑡.
Convert length and width from feet to cm using the scale
Redraw the patio using the cm you just found!

18. Redrawing a shape with a different scale factor
2. A patio has sides that are 10 feet in length and 5 feet wide. Using the graph on the answer document, draw a scale drawing of the garden using the scale of 2 𝑐𝑚 = 5 𝑓𝑡.
Convert length and width from feet to cm using the scale
Patio scale drawing!
2 𝑐𝑚 5 𝑓𝑡 = 𝑥 𝑐𝑚 10 𝑓𝑡
length= 4 cm
2 𝑐𝑚 5 𝑓𝑡 = 𝑥 𝑐𝑚 5 𝑓𝑡
Width = 2 cm

19. Scavenger hunt Complete the scavenger hunt
You will need a piece of paper for your responses
When you are finished, make sure your classwork Quizizz is complete!