Geo_Book_Answers

Answers to Exercises
1.
2. reflection
3.
4.
5.
–5
–4
5
5
y
8
–8
y
rotation
y
translation
5
–5
y
x
reflection
5
LESSON 7.2
86 ANSWERS TO EXERCISES
y
5
reflection
5
5
7
x
x
x
x
6. Rules that involve x or y changing signs,
or switching places, produce reflections.
If both x and y change signs, the rule produces a
rotation. Rules that produce translations involve a
constant being added to the x and/or y terms.
5, 0 is the translation vector for Exercise 1.
7. (x, y) → (x, y)
8. (x, y) → (x, y)
9.
10. There are two possible points, one on the N
wall and one on the W wall.
11.
12. by the Minimal Path Conjecture
13.
14.
W
T
Proposed freeway
Perry
,
W
N
W E
S
T
N
8 ball
S
N
S
H H'
Mason
Cue ball
H''
H
E
E