step by step solution please
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Step-by-step explanation:
angle 1 : angle 2
4 : 5
4x + 5x = 180
9x = 180
x= 20
80 : 100
angle 1 = angle 3 = angle 5 = angle 7 = 80 degrees
angle 2 = angle 4 = angle 6 = angle 8 = 100 degrees
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