Definitions
What's Missing
Miscellaneous
Ratios
Scale Factor
100
The number side lengths are multiplied by to get the side lengths of a similar shape.
What is the Scale Factor
100
Find the height of the tree, h.
16 ft
100
Original (x, y) Image (5x, 5y)
Would this produce a similar figure? Why or why not?
What is yes, similar. (Same SF applied)
100
Write a ratio of 15 boys to 12 girls
15 to 12 = 5 to 4
15/12 = 5/4
15:12 = 5:4
100
What is the scale factor from the smaller figure to the larger figure?
Scale factor of 2
200
The comparison of two things (ex: length to width)
What is a Ratio
200
Which sides are similar?
DE= ZY
AB = VW
BC= Wx
AE= VZ
CD= XY
200
What copier size factor was used to create an image that is 1.5 times larger?
What is 150%?
200
A class has 12 students who like football and 5 who do not like football. Write a ratio of students who do not like football to those who like football.
5 to 12
200
What is the Scale Factor?
Mrs. Hatfield will show you the picture! :)
1.5
300
Exactly the same shape and size
Congruent
300
_____________ and ______________ are two methods that can be used to find missing side lengths of similar figures.
Scale factor and ratios (proportions)
300
Name what our current unit is called.
Dialations
300
Are the following ratios equivalent?
4:6 and 18:24
no
300
How does the Scale Factor affect the perimeter of a figure?
The perimeter changes by the scale factor.
400
What must be true for shapes to be similar?
- Same shape
-Corresponding angles are congruent
-Corresponding sides are proportional (equal ratios)
400
Are these shapes similar figures?
Yes
Scale factor of 2
400
Write an equivalent ratio to the ratio 4:5
8:10
12:15
16:20
400
What is the scale factor from the shadow of the wall to the shadow of the tree?
4
500
Describe what corresponding sides are in similar figures.
Corresponding sides are the sides in the same position on two different figures
500
Use the picture to find the height of the tree.
10 ft
500
Solve for x.
x = 14
500
How does the Scale Factor affect the area of a figure?
The area changes by the scale factor multiplied by the scale factor or the scale factor squared. Example, if the scale factor is 3, the area changes by 9.