Similarity Transformations — Test Answers

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To prove that triangle cap d cap f cap e approximates triangle cap g cap f cap h by the SAS similarity theorem, it can be stated that the fraction with numerator cap d cap f and denominator cap g cap f is equal to the fraction with numerator cap e cap f and denominator cap h cap f and

A
angle cap d cap f cap e is congruent to angle cap g cap f cap h .
B
angle cap f cap h cap g is 1 fourth the measure of angle cap f cap e cap d .
C
angle cap d cap f cap e is 4 times greater than angle cap g cap f cap h .
D
angle cap f cap h cap g is congruent to angle cap e cap f cap d .
3

Is triangle cap A prime cap b prime cap c prime a dilation of triangle ABC ? Explain.

A
Yes, it is an enlargement with a scale factor of 3 .
B
Yes, it is an enlargement with a scale factor of 8 thirds .
C
No, it is not a dilation because the points of the image are not moved away from the center of dilation proportionally.
D
No, it is not a dilation because the sides of the image are proportionally reduced from the pre-image.
4

What are the coordinates of vertex cap j of the pre-image?

A
open paren 0 comma negative 4 close paren
B
open paren 0 comma 4 close paren
C
open paren 0 comma 0 close paren
D
open paren 0 comma negative 1 close paren
5

Which transformations could have occurred to map triangle ABC to triangle cap A double prime cap b double prime cap c double prime ?

A
a reflection and a dilation
B
a dilation and a rotation
C
a rotation and a reflection
D
a translation and a dilation
6

Which statements are true? Choose three correct answers.

A
triangle DEF approximates triangle cap d prime cap e prime cap f prime
B
Segment EE prime is parallel to segment FF prime .
C
The measure of angle cap e prime is 1 third the measure of angle cap e .
D
angle cap f corresponds to angle cap f prime .
E
The distance from point cap d prime to the origin is 1 third the distance of point cap d to the origin.
7

Which statements can be concluded from the diagram and used to prove that the triangles are similar by the SAS similarity theorem?

A
the fraction with numerator cap r cap s and denominator cap v cap u is equal to the fraction with numerator cap s cap t and denominator cap u cap t and angle cap s is congruent to angle cap u
B
the fraction with numerator cap r cap s and denominator cap v cap u is equal to the fraction with numerator cap s cap t and denominator cap u cap t is equal to the fraction with numerator cap r cap t and denominator cap v cap t
C
the fraction with numerator cap r cap s and denominator cap v cap u is equal to the fraction with numerator cap t cap u and denominator cap t cap s is equal to the fraction with numerator cap r cap t and denominator cap v cap t
D
the fraction with numerator cap r cap s and denominator cap v cap u is equal to the fraction with numerator cap t cap u and denominator cap t cap s and angle cap s is congruent to angle cap u
9

Which best explains why all equilateral triangles are similar?

A
All equilateral triangles can be mapped onto each other using combinations of dilations and rigid transformations.
B
All equilateral triangles can be mapped onto each other using rigid transformations.
C
All equilateral triangles can be mapped onto each other using dilations.
D
All equilateral triangles are congruent and therefore similar, with side lengths in a ratio of 1 to 1 ratio.
10

What are the coordinates of the endpoints of the segment cap t prime cap v prime ?

A
cap t prime times open paren negative 3 comma 6 close paren and cap v prime times open paren 0 comma 3 close paren
B
cap t prime times open paren negative 3 comma 6 close paren and cap v prime times open paren 0 comma 1 close paren
C
cap t prime times open paren negative 1 comma 2 close paren and cap v prime times open paren 0 comma 3 close paren
D
cap t prime times open paren negative 1 comma 2 close paren and cap v prime times open paren 0 comma 1 close paren
12

Why is the information in the diagram enough to determine that triangle LMN approximates triangle PON using a rotation about point cap n and a dilation?

A
because angle MNL and angle ONP are congruent angles
B
because one pair of congruent corresponding angles is sufficient to determine similar triangles
C
because both triangles appear to be isosceles, angle MNL is congruent to angle ONP , and angle NOP is congruent to angle OPN
D
because both triangles appear to be equilateral
13

Is rectangle EFGH the result of a dilation of rectangle ABCD with a center of dilation at the origin? Why or why not?

A
Yes, because corresponding sides are parallel and have lengths in the ratio 4 thirds .
B
No, because the center of dilation is not at open paren 0 comma 0 close paren .
C
No, because corresponding sides have different slopes.
D
Yes, because both figures are rectangles and all rectangles are similar.
14

If PG prime equals 0 point 5 units, what is PG ?

A
2 point 5 units
B
3 units
C
6 units
D
4 point 5 units
15

To prove that the triangles are similar by the SAS similarity theorem, it needs to be shown that

A
angle cap c is congruent to angle cap c .
B
the fraction with numerator cap A cap c and denominator cap g cap i is equal to the fraction with numerator cap b cap c and denominator cap h cap i .
C
the fraction with numerator cap A cap c and denominator cap g cap i is equal to the fraction with numerator cap h cap i and denominator cap b cap c .
D
angle cap c is congruent to angle cap g .
17

Right triangle ABC is reflected over line segment AC , then dilated by a scale factor of 2 thirds to form triangle DEC Which statements about the two triangles must be true? Choose three correct answers.

A
3 m angle cap A is equal to 2 m angle cap d
B
2 m angle cap A is equal to 3 m angle cap d
C
3DE is equal to 2AB
D
triangle ABC approximates triangle DEC
E
3BC is equal to 2EC
F
angle cap b is congruent to angle cap e

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