AnswersMathematics IISimilarity Transformations

Similarity Transformations — Test Answers

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3

What is the value of y ?

A
9 square root of 3 units
B
12 square root of 3 units
C
6 square root of 3 units
D
3 square root of 3 units
4

If the triangles are similar, which must be true?

A
the fraction with numerator cap r cap y and denominator cap r cap x is equal to the fraction with numerator cap r cap s and denominator cap r cap t is equal to the fraction with numerator cap x cap y and denominator cap t cap s
B
the fraction with numerator cap r cap y and denominator cap y cap s is equal to the fraction with numerator cap r cap x and denominator cap x cap t is equal to the fraction with numerator cap x cap y and denominator cap t cap s
C
the fraction with numerator cap r cap y and denominator cap r cap s is equal to the fraction with numerator cap r cap x and denominator cap r cap t is equal to the fraction with numerator cap r cap s and denominator cap r cap y
D
the fraction with numerator cap r cap y and denominator cap r cap s is equal to the fraction with numerator cap r cap x and denominator cap r cap t is equal to the fraction with numerator cap x cap y and denominator cap t cap s
6

What is the perimeter of triangle WXY ?

A
12 point 4 6 cm
B
14 point 5 0 cm
C
11 point 5 7 cm
D
12 point 2 2 cm
7

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 translation and a dilation
B
a reflection and a dilation
C
a rotation and a reflection
D
a dilation and a rotation
8

On a number line, the directed line segment from cap q to cap s has endpoints cap q at negative 14 and cap s at 2 Point cap r partitions the directed line segment from cap q to cap s in a ratio of 3 to 5 ratio. Which expression correctly uses the formula open paren the fraction with numerator m and denominator m plus n close paren times open paren x sub 2 minus x sub 1 close paren plus x sub 1 to find the location of point cap r ?

A
open paren the fraction with numerator 3 and denominator 3 plus 5 close paren times open paren negative 14 minus 2 close paren plus 2
B
open paren the fraction with numerator 3 and denominator 3 plus 5 close paren times open paren 2 minus 14 close paren plus 14
C
open paren the fraction with numerator 3 and denominator 3 plus 5 close paren times open paren negative 14 minus 2 close paren minus 2
D
open paren the fraction with numerator 3 and denominator 3 plus 5 close paren times open paren 2 minus negative 14 close paren plus negative 14
10

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 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
B
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
C
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
D
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
12

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 f cap h cap g is 1 fourth the measure of angle cap f cap e cap d .
B
angle cap f cap h cap g is congruent to angle cap e cap f 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 d cap f cap e is congruent to angle cap g cap f cap h .
13

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

A
No, it is not a dilation because the points of the image are not moved away from the center of dilation proportionally.
B
No, it is not a dilation because the sides of the image are proportionally reduced from the pre-image.
C
Yes, it is an enlargement with a scale factor of 8 thirds .
D
Yes, it is an enlargement with a scale factor of 3 .
14

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

A
cap t prime times open paren negative 1 comma 2 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 3 comma 6 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
15

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

A
open paren 0 comma negative 1 close paren
B
open paren 0 comma 0 close paren
C
open paren 0 comma 4 close paren
D
open paren 0 comma negative 4 close paren
18

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 one pair of congruent corresponding angles is sufficient to determine similar triangles
B
because both triangles appear to be isosceles, angle MNL is congruent to angle ONP , and angle NOP is congruent to angle OPN
C
because both triangles appear to be equilateral
D
because angle MNL and angle ONP are congruent angles
19

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

A
No, because the center of dilation is not at open paren 0 comma 0 close paren .
B
No, because corresponding sides have different slopes.
C
Yes, because both figures are rectangles and all rectangles are similar.
D
Yes, because corresponding sides are parallel and have lengths in the ratio 4 thirds .
20

What is the length of line segment SR ?

A
15 units
B
12 units
C
18 units
D
9 units
21

If triangle YWZ approximates triangle YXW , what is true about angle XWZ ?

A
angle XWZ is an obtuse angle.
B
angle XWZ is congruent to angle WXY .
C
angle XWZ is congruent to angle XZW .
D
angle XWZ is a right angle.

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