find the angle y in the figures
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(a) y = 100°
(c) y = 70°
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Step-by-step explanation:
a. exterior angles mark 360°
140° + 120° + y = 360° ( angle sum property )
y = 360° - 260°
y = 100°
b. let the other part angle near to y be x
x = 110° ( corresponding angle )
180° - 110° = 70° ( linear pair )
y = 70°
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