odeling with Mathematics
angle.
4
S
In Exercises 9-12, find the angle measure. Then classify
the angle. (See Example 2.)
9. mZAOC
11. m/COD
40 50 60 70 80 90 100 110 120 130
140 130 120 110 100 90 80 70 60 50
10 20
10 170 160 150 1
A
C
D
E
30 20 10
150 160 170 180
B
성향
10. m/BOD
12. mZEOD