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Angles
GEOMETRY
DEFINITION:
An angle
consists of two
vertex
rays joined at
their endpoints,
which is called the
A
“vertex”.
4 possible
names:
B
C
This is a straight angle.
These angles are acute.
These angles are obtuse.
150°
90°
1.
This is a zero angle.
∠BAC
∠CAB
∠A
∠1
1
These are are right. angles.
17°
90°
90°
NAME_________________________
DATE __________ Per.___________
89°
30°
100°
1°
91°
179°
Fill in the blanks to complete each definition.
a) A zero angle has an angle measure of _____ degrees.
b) An __________ angle has a measure more than 0° but less than 90°.
c) A right angle has an angle measure of _____ degrees.
d) An __________ angle’s measure is bigger than 90° but less than 180°.
e) A straight angle’s measure is _____ degrees.
2. Use the diagram below to name:
R
a) a straight angle _________
T
b) an acute angle _________
c) an obtuse angle _________
45°
d) a right angle _________
45°
e) a zero angle _________
M
3.
A
P
Classify each angle’s type as acute, right, obtuse, straight, or zero.
a) ∠COP __________
b) ∠TOP __________
C
T
c) ∠DOC __________
D
d) ∠POP __________
45°
G
O
P
e) ∠POG __________