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E:\Working\Focus_Learning\Math_Genius_5_(05-10-2023)\Open_Files\CHAP_06
\\November 23, 2023 10:09 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

Note
The measure of an angle is C
not affected by the length C
of the arms of the angle. C

60° 60° 60°
O B O B O B

practice time 6c

1. give the measure of the following angles by reading scales on protractor.

(a) (b)
80 90 100 80 90 100
70 110 70 110
60 120 110 100 90 80 70 120 60 120 110 100 90 80 70 120
50 60 130 50 60 130
40 140 130 50 40 140 40 140 130 50 40 140
30 150 30 150
150 30 150 30
20 160 20 160 20 160 20 160
10 170 10 170 10 170 10 170
0 180 0 180 0 180 0 180

(c) (d)
80 90 100 80 90 100
70 110 70 110
60 120 110 100 90 80 70 120 60 120 110 100 90 80 70 120
50 60 130 50 60 130
40 140 130 50 40 140 40 140 130 50 40 140
30 150 30 150 30 150 30 150
20 160 20 160 20 160 20 160
10 170 10 170 10 170 10 170
180 0 0 180 0 180
0 180

(e) 180 0 180 0 (f)
170 10 170 10
80 90 100 110
70
160 20 160 20 60 120 110 100 90 80 70 120
30 150 60
150 30 50 130
40 140 40 130 50 140
140 40 140 40
50 130
130 50 30 150 30 150
60
120 70 120 110 100 60
20 160
80
90
110 100 90 80 70 160 20
10 170 10 170
0 180 0 180
2. Use a protractor to measure each angle.
(a) (b) (c) (d)
A
P S G

Q R O D
B C T U

∠ABC = _____ ∠PQR = _____ ∠STU = _____ ∠GOD = _____

134 Mathematics-5