Chapter 8
238
Chapter 8 Quadrilaterals
Page 403
Getting Started
1.
The angles measuring
x
° and 50° are
supplementary. Find
x
.
m
/
x
1
50
5
180
m
/
x
5
130
So,
x
is 130.
2.
x
°is the measure of the exterior angle of the
triangle so its measure is the sum of the two
remote interior angles or 25
1
20. So,
x
5
45.
3.
The measure of an internal angle of an
equilateral triangle is 60. The angle measuring
x
°
is supplementary to one of the angles. Find
x.
m
/
x
1
60
5
180
m
/
x
5
120
So,
x
is 120.
4.
The slope is given by
m
5
}
y
x
2
2
2
2
y
x
1
1
}
.
R
w
S
w
:
}
2
10
1
2
2
3
4
} 5
¬
2 }
7
5
}
T
w
S
w
:
}
2
10
1
2
2
2
1
0
3
} 5
¬
}
2
2
1
1
0
4
}
5
¬
}
5
7
}
R
w
S
w
and
T
w
S
w
are perpendicular since their slopes
are opposite inverses.
5.
The slope is given by
m
5
}
y
x
2
2
2
2
y
x
1
1
}
.
R
w
S
w
:
}
3
8
2
2
(
2
6
9)
} 5 }
1
2
2
}
5
}
1
6
}
T
w
S
w
:
}
8
3
2
2
2
1
0
} 5 }
2
2
12
}
52
6
R
w
S
w
and
T
w
S
w
are perpendicular since their slopes
are opposite inverses.
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, Quadrilaterals, Slope

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