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Notes (Yeates)
Name____________
Focus: Basic Language of Geometry
Betweeness
N
M
O
Q
P
O is between M and Q
N and P are not between M and Q
Angle: two rays with a common endpoint called the
vertex.
Q
<QRS
<SRQ
<R
R
S
Acute Angle
Right Angle
xo
xo
0o < xo < 90o
Straight Angle
x = 180o
x = 90o
xo
Obtuse Angle
xo
90o < xo < 180o
Interior vs. Exterior Points: Use I’s and E’s
Adjacent Angles:
a) common vertex
ALL 3
MUST be b) common side
TRUE!
c) have no common interior points
Determine which of the following are adjacent
angles and justify your answer:
A)
B)
C)
D)
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