bellwork 1.what is the intersection of plane yxw and plane utv? 2.is r on plane stw? 3.b is between...
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Bellwork1. What is the intersection of plane YXW and
plane UTV?
2. Is R on plane STW?
3. B is between D and E. If DE = 2.5 and BD = 1.3, what is BE?
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1.5a Angle Relationships
Students will be able to identify if two angles are adjacent, vertical, supplementary, complementary or a linear pair.
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Angle PairsSpecial Pairs Definition
KeywordExample Non-Example
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Example 1
Draw the diagram and name the following:
a) Vertical angles:
b) Obtuse vertical angles:
c) Linear Pair:
d) Complementary angles:
e) Supplementary angles:
54
3 12
D M
L
K
N
O
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Example 2
• The , what is the measure of its…
Complement?Supplement?
47m A
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Perpendicular (Defn)--Toolbox • If two lines (segments, rays) form a
90° angle, then they are perpendicular ( ).
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Example 3
• Find x so that . DZ ZP����������������������������
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Ticket to Leave1. Name an angle adjacent to .2.Name an angle vertical to .3.Name an angle that forms a linear pair with .4.Name an angle that is supplementary to .
HKJEKH
JKGEKF
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Homework
Worksheet
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Adjacent Angles (Defn)
&SRT TRU &SRT SRU they overlap
Example Non-example
are adjacent angles
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Pairs of Angles (cont’d)Vertical angles- nonadjacent angles formed by two intersecting lines.
not adjacent
Example Non-example
21
D
If two angles are vertical, then ______________________
<1 and <3
<2 and <4
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Pairs of Angles (cont’d)
Linear Pair- adjacent angles whose noncommon sides are opposite rays. The angles form a linear pair.
5& 6
- not straightExample Non-example
1 2
D
If you have a linear pair, then ______________________