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Answer:
angle COD = 80 degree
Step-by-step explanation:
40 + 4x + 3x = 180 [linear pair]
40 + 7x = 180
7x = 140
x = 20
angle COD = 4 * 20 = 80
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7x = 180-40=140
x= 20
root COD = 20 multiply 4=80 degree
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