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8.
Write proportions for finding side measures.
5
4
x
5
¬
60
x
5
¬
15
5
4
y
5
¬
40
y
5
¬
10
The new length is 15 cm, and the new height is
10 cm.
9.
Write proportions for finding side measures.
5
5
x
5
15
}
5
y
}
5
5
y
5
25
5
5
z
5
20
The new side lengths are 15 m, 25 m, and 20 m,
so the perimeter is 15 m
1
25 m
1
20 m
5
60 m.
10.
See students’ drawings. The drawings will be
similar since the measures of the corresponding
sides will be proportional and the corresponding
angles will be congruent.
Pages 293–297
Practice and Apply
11.
/
BCF
>
/
DCF
,
/
ABC
>
/
EDC
,
/
BAF
>
/
DEF
,
and
/
AFC
>
/
EFC
;
B
w
C
w
>
D
w
C
w
,
A
w
B
w
>
E
w
D
w
;
A
w
F
w
>
E
w
F
w
, and
C
w
F
w
>
C
w
F
w
. Therefore,
ABCF
is
similar to
EDCF
since they are congruent.
12.
/
1
>
/
2
>
/
3
>
4;
/
6
>
/
5 because if two
angles of one triangle are congruent to two angles
of a second triangle, then the third angles are
congruent.
X
w
Y
w
>
X
w
W
w
>
X
w
Z
w
, and
Y
w
W
w
>
W
w
Z
w
, so the
ratio of the corresponding sides is 1. Therefore,
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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, Ratios, Angles

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