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68.
You could use the slope formula to find that
B
w
C
w
±
B
w
±
w
C
w
±
w
.Thus,
/
ABC
>
/
A
±
B
±
C
±
and
/
ACB
>
/
A
±
C
±
B
±
because of corresponding
angles.
/
A
>
/
A
±
because of the Third Angle
Theorem.
69.
The sides are proportional and the angles are
congruent, so the triangles are similar.
Page 297
Maintain Your Skills
70.
}
7
b
.8
}
5
¬
}
2
3
}
3
b
5
¬
7.8(2)
3
b
5
¬
15.6
b
5
¬
5.2
71.
}
c
c
2
1
2
3
} 5
¬
}
5
4
}
(
c
2
2)(4)
5
¬
(
c
1
3)(5)
4
c
2
8
5
¬
5
c
1
15
2
c
2
8
5
¬
15
2
c
5
¬
23
c
5
¬
2
23
72.
}
4
y
2
1
5
} 5
¬
}
2
y
4
}
2
y
5
¬
(4
y
1
5)(
2
4)
2
y
5
¬
2
16
y
2
20
18
y
5
¬
2
20
y
5
¬
2 }
1
9
0
}
73.
B
w
C
w
>
B
w
A
w
,
B
w
O
w
>
B
w
O
w
, and
m
/
OBC
.
m
/
OBA
.By
the SAS Inequality,
OC
.
AO
.
74.
n
ABC
is isosceles with base angles
}
1
2
}
[180
2
(68
1
40)]
5
36. Then
m
/
AOB
5
180
2
(40
1
36)
5
104 and
m
/
AOD
5
180
2
104
5
76 so,
m
/
AOD
,
m
/
AOB
.
75.
m
/
ABD
.
m
/
ADB
because if one side of a
triangle is longer than another side, then the
angle opposite the longer side has a greater
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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, Slope

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