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4. In Fig. 4, AB II CD. Find the value of x and y.75600Fig. 4

Answer»

Sum of angles in a triangle is 180.= 75 + 60 + angle c = 180 = 135 + angle c = 180= angle c = 45

= Angle x and and B are interior opposite angles in parallel lines, and by property the are equal.Hence, x = 75.

= Angle C + angle x + angle y = 180

= 75 + 45 + y = 180 = y = 60.



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