find the value of cod ...
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Step-by-step explanation:
x+20 + 2x-20 +60 = 180(linear pair)
3x + 60 = 180
3x = 180 - 60
3x = 120
x = 120 ÷3
x = 40
/_ COD = 2x - 20 = 2×40 +20 = 80 +20 = 100°
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