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Unformatted text preview: 9. Using corresponding angles,
AM
CM
25
x 20 MAD 300
3x2 60x
0
3x2 60x 300
0 x2 20x 100
0 (x 10)(x 10)
x 10 0
x
10
3x
The scale factor is DM
12
BM
5 : 2.
PQ
10. ML
PR
MN
QR
LN MCB. 17. DM
BM
3x
12 BC
CM
BC
6
3( 10)
12 4(8 KJ)
32 4(KJ)
32
2
14. GK
KJ
GK
6
GK
6 7(GK)
GK
15. GK
KJ
6
4 18. x 3 12 27 12 87 7.5 8 4.5 or 87
462 height of fence 19. height of backboard
4 ft
x
48
x shadow of fence
shadow of backboard ¬ 20 in.
65 in. ¬ 20
65
3120 ¬20x
156 ¬x
The height of the top of the backboard is
156 inches, or 13 feet.
20. B; X Y is spent, which is X X Y as part of the
weekly salary. Chapter 6 Standardized Test Practice
Pages 338–339 GH
HI
7
14 7
7
7 1. B;  8
2. B; d 2
[5  6
( 6 3)]2 (2 17)2 ( 2)2 ( 15)2
4 225
229 miles 42
6
GH
HI
9
HI 10x 420
x 42
The perimeter of MB
¬ 8 10
¬448 6(MB)
¬6(MB)
¬MB
perimeter of ABC is 10 5x 12(KJ)
12(KJ)
16(KJ)
KJ perimeter of
perimeter of
7 10 13
x
30
x ¬ AB
AC 75
27
4.5
The
30. GH
HI
12
4 3. A
4. D 6(HI) 36
HI 6
GI GH HI
9 6 or 15
16. Let x represent the perimeter of
CB
EF
10
14
10
14 60
7.5 BC
CM
7.5
6 5
1
10 or 2
6
1
12 or 2
3
1
6 or 2 GK
KJ
8 KJ
KJ AC
AM
10
8 8(BC)
BC 30
12 or Corresponding sides are proportional, so the
triangles are similar by SSS Similarity.
11. PTS
QTR since they are vertical angles.
m PTS m QTR 90.
m PTS m S m P 180
90 62 m P 180
m P 28
m QTR m R m Q 180
90 66 m Q 180
m Q 24
Since only one pair of corresponding angles is
congruent, the triangles are not similar.
12. ED CB so AED
ACB and ADE
ABC
because corresponding angles are congruent. Then
the triangles are similar by AA Similarity.
13. CMA
ACB and A
A, so
ABC
ACM by AA Similarity.
(AM)2 62 102
(AM)2 36 100
(AM)2 64
AM 8 5
5. A; 1.2 fcm
t
1.5x
x 25
¬ 11.x ftcm
¬22.5
¬15 ft 5
6. B; 45
63
7 , so the dimensions could be 7 inches by
5 inches.
s
p
7. C; u
r because side UT corresponds to side RQ
and side ST corresponds to side PQ.
8. D
9. counterexample DEF. ACB
DEF DEF is 42 units. 187 Chapter 6 ...
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.
 Fall '10
 Dr.Zhan
 Calculus, PreCalculus, Angles

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