10. in the given figure below,AB||CD. if 2 =(2x+30)°,4 = (x+2y)° and 6 =(3y+10)°. then the measure of 5 is
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angle 2=angle 4=angle 6=angle 8
So 2x+30= x+2y
means 2y-x=30
next, x+2y= 3y+10
y-x= -10
solving we get y= 40
and
x= 50
So angle 2= 130°
Hence angle 5=angle 1 =angle 3=angle 7
= 180°-130° = 50°
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