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Chapter 7 Similarity
The ratio of the angle measures in a triangle is
1:2:3.  What is the measure of the largest angle?
(write you answer as the number only, no degree
sign needed)
Solve the following proportion for x.

40   =  2
120      x
Solve the following proportion for x.

x+2   =  x-1
   3          4
The ratio of the lengths of a triangle are 4:6:9 and
its perimeter is 57cm.  Find the length of the
shortest side.  (Give answer as number only,
no units)
Write a ratio expressing the slope of line m.

Write a ratio expressing the slope of line l.
Write the numerator as a negative number
(no space between negative sign & #) and
the denominator as a positive number.

Solve the following proportion for x.

  x   = 3+x
  2         8
Solve the following proportion for x.

  x   =     50
  14         35
Are the figures below similar?


Yes
No
Are the figures below similar?


Yes
No
Are the figures below similar?


Yes
No
Are the figures below similar?


Yes
No
Determine whether the polygons below are similar.
Similar
Not Similar
Write a similarity statement for the similar
polygons below.
JIHK ~
Write a similarity statement for the similar
polygons below.
ABC ~
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
Not similar
Similar, AA
 Similar, SAS
Similar SSS
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
Not similar
Similar, AA
 Similar, SAS
Similar SSS
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
Not similar
Similar, AA
 Similar, SAS
Similar SSS
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
Similar SSS
Not similar
 Similar, SAS
Similar, AA
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
 Similar, SAS
Similar SSS
Not similar
Similar, AA
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
 Similar, SAS
Similar SSS
Not similar
Similar, AA
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
Not similar
Similar, AA
 Similar, SAS
Similar SSS
Determine whether the polygons are similar. 
If so, identify the theorem or postulate used.
 Similar, SAS
Similar, AA
Similar SSS
Not similar
Find  the perimeter of WXYZ.
(just write the number, no units)
Find  the area of WXYZ.
(just write the number, no units)
Find the height of the pole, segment DF.  Write
                                               your answer without
                                               units.
Round your answer to the nearest foot.
Round to the nearest foot. 
21.4 m
90.0 m
168.0 m
288.0 m
23.45 m
30.6 m
75.0 m
85.8 m
Given that ∆ABC~∆ADE, find the scale factor.
3/5
5/3
5/4
3/4
Given that ∆ABC~∆ADE, find the coordinates of D.
(0, -20)
(-20, 0)
(0, -11)
(-11, 0)
Given that ∆PQR~∆PST, find the scale factor.
3
1.13
2.67
.89
Given that ∆PQR~∆PST, find the coordinates of S.
(0, 8)
(0, 6)
(6, 0)
(8, 0)
The figure shows a photograph on grid paper.
What are the coordinates of C' if the photo is
enlarged by a dilation of 1.5?
(3, 5)
(4.5, 5)
(3, 7.5)
(4.5, 7.5)
T'(15, 22.5)
T'(7.5, 9)
T'(4.5, 6.75)
T'(2.5, 20)
1/3
1/2
2/3
3/2
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