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123_G4U6_WB˜ ˙—» ¿º 2011.3.30 5:31 PM ˘ ` 3 PDF_In 2540DPI 300LPI T
123-B2-1
Acute Angles, Right Angles, and Obtuse Angles (2)
1. Look at each clock. Determine whether the angle between the minute
hand and the hour hand is an acute angle, right angle, or obtuse angle.
Example a. 11 : 05
1 : 25
11 12 1 11 12 1
10 2 10 2
93 93
84 84
765 765
b. 8 : 30 c. 4 : 45
11 12 1 11 12 1
10 2 10 2
93 93
84 84
765 765
d. 1 : 50 e. 3 : 10
11 12 1 11 12 1
10 2 10 2
93 93
84 84
765 765
123-B2-1
Acute Angles, Right Angles, and Obtuse Angles (2)
1. Look at each clock. Determine whether the angle between the minute
hand and the hour hand is an acute angle, right angle, or obtuse angle.
Example a. 11 : 05
1 : 25
11 12 1 11 12 1
10 2 10 2
93 93
84 84
765 765
b. 8 : 30 c. 4 : 45
11 12 1 11 12 1
10 2 10 2
93 93
84 84
765 765
d. 1 : 50 e. 3 : 10
11 12 1 11 12 1
10 2 10 2
93 93
84 84
765 765
