determine the
value of x and y
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we know that AB is a straight line
so angle A is
160 + a = 180 (linear pair)
a = 180 -160
a= 20°
20 + 50 + y = 180 ( angle sum property)
y = 180 - 70
y = 110°
y + x= 180°(linear pair)
110 +x = 180
x = 180-110
x=70
so angle A is
160 + a = 180 (linear pair)
a = 180 -160
a= 20°
20 + 50 + y = 180 ( angle sum property)
y = 180 - 70
y = 110°
y + x= 180°(linear pair)
110 +x = 180
x = 180-110
x=70
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