Using a Protractor 1 2 4 5 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 P Q R The protractor’s arrow and pen hole is placed on the angle’s vertex. The 0˚ line is placed over one side of the angle. Read the measure where the other leg of the angle intersects the protractor. PQR measures 70˚. LMN = L M N ABC = A B C UVW = U V W GHI = G H I H
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Using a Protractor
1 2 4 5
1020
3040
5060
70 80 90 100 110120
130
140150
160170
170
160
150
140
130
120110
100 90 8070
60
50
40
3020
100
P
Q R
The protractor’s arrow and pen hole isplaced on the angle’s vertex. The 0˚ lineis placed over one side of the angle.Read the measure where the other leg ofthe angle intersects the protractor.
PQR measures 70˚.
LMN =
L
M N
ABC =
A
B C
UVW =
U
V W
GHI =
G
H IH
ANSWER KEY
135° 80°
35° 95°RB
Using a Protractor
1 2 4 5
1020
3040
5060
70 80 90 100 110120
130
140150
160170
170
160
150
140
130
120110
100 90 8070
60
50
40
3020
100
P
Q R
The protractor’s arrow and pen hole isplaced on the angle’s vertex. The 0˚ lineis placed over one side of the angle.Read the measure where the other leg ofthe angle intersects the protractor.
PQR measures 70˚.
LMN =
L
M N
ABC =
A
B C
UVW =
U
V W
GHI =
G
H IH
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