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1._8_
2._1_.
3.__supplementry__
4._both_a_and_b___.
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Answer:
1) 8
2) 1
3) equal
4). both a and b
II .a) 4x + 40° = 180° ( co-interior are added upto 180°)
4x = 180 - 40
x = 140/4
x = 35°
b) 80° = 2x - 20° ( corresponding angles are equal)
2x = 80° - 20°
x = 60°/2
x = 30°.
c) 4x + 4° + 80° = 180°
4x + 84° = 180°
4x = 180° - 84°
x = 96°/4
x = 24°.
d) x = 60° ( corresponding angles are equal).
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