Download Perpendicular lines form right angles. Parallel lines never intersect.

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Perpendicular lines form right angles.
Parallel lines never intersect.
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Skew lines are not parallel and yet they do not
intersect.
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Adjacent Angles- side by side, next to each
other; they share a common side, a common
vertex, and do not overlap. Adjacent angles
are supplementary.
a
b
c d
Adjacent angles:
a & b, a & c, b & d, c & d
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Vertical angles- angles formed by
intersecting lines that are opposite one
another. Vertical angles are congruent.
a
b
c d
Angles a & d are vertical.
Angles b & c are vertical.
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Transversal- a line that intersects two(or
more) lines.
A transversal is usually shown crossing two
parallel lines.
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Corresponding Angles- angles that
correspond, or are in the same position
compared to the point of intersection.
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Alternate Interior angles- angles that are
on opposite sides of the transversal as well
as inside the parallel lines.
Alternate Exterior angles- angles that are
on opposite sides of the transversal as well
as outside the parallel lines.
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7.G.5
Use facts about supplementary,
complementary, vertical, and adjacent angles in
a multi-step problem to write and solve simple
equations for an unknown angle in a figure.
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25
o
1
2
3
5
4
6
7
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25
o
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1
3
4
6
5
7
2
o
115
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1
2
3
4
5
165
6
7
o
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Calculate the measure of each angle
2x + 46
o
1 2 3x-6o
m 1 = ________
m 2 = _________
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8x - 18
o
o
1
2
3x + 11
What is the measure of angle #1? #2?
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m
a
t
h
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1 2
3 4
5 6
7 8
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A. adjacent
B. vertical
C. corresponding
D. none of these
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1 2
4 3
5 6
8 7
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