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As we can see that <1=<4 (vertically opposite angles )
Hence ratio of <2&<4 =5:4
Also <4=<8 (corresponding angles)
Hence <1=<4=<8
Thus ratio of <1&<8 =4:4
ie 1:1
Hope this will help you:)
Verified answer
Ratio of the angle 1 and 2 is 4:5
so let the ratio be 4x and 5x
so, 4x+5x =180°(linear pair)
9x=180°
x=180/9=20°
so angle 1 =4×20=80°
and angle 2 =5×20=100°.
Angle 1 is also equal to angle 8 because they are alternate exterior angles.
so angle 8 = 80
so the ration between angle 1 and 8 is 80/80
which is 1:1