Look for patterns that will help you to describe the changes you see in perimeter and area when figures are changed proportionally.
Question 1
1.
What generalization can you make about the effects of the scale factor on the measurements figure?
Question 2
2.
Question 3
3.
Question 4
4.
Let's summarize the effects of scale factor on Perimeter and Area
Question 5
5.
How would you describe the effects on perimeter when figures are changed proportionally?
Question 6
6.
Question 7
7.
How would you describe the effects on area when figures are changed proportionally?
Question 8
8.
How did the scale factor affect the dimensions?
The scale factor does not affect the dimensions.
The dimensions are 3 times smaller than the original image.
The dimensions are 3 times larger than the original image.
How did the scale factor affect the perimeter?
The scale factor does not affect the perimeter.
The perimeter is 3 times smaller than the original image.
The perimeter is 3 times larger than the original image.
How did the scale factor affect the area?
The area is 3 times larger than the original.
The area is 9 times larger than the original.
The area is 3 times smaller than the original.
The area is 9 times smaller than the origina.
Mrs. Capps has plans for a rectangular garden that measures 8 ft. by 10 ft. Unfortunately, she does not
have enough room in her backyard and needs to decrease the size of her garden. She only has room for
a garden that has dimensions 0.75 times the size of the original dimensions. What is the perimeter of
her new garden?
36 feet
27 feet
60 feet
80 feet
The rug in Danielle’s room has an area of 32 sq. ft. Over break she made similar rug for her tree house with an area of 8 sq. ft. What scale factor did she use to reduce the size of the rug?