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angle 4 = angle 2 = 70° (if 2 lines intersect,then the vertically opposite angles are equal)
angle 3 = angle 1 = ? (if 2 lines intersect,then the vertically opposite angles are equal)
angle 4 + angle 1 = 180° (linear pair)
70+x=180
x=180-70=110
we know,angle 1 = angle 3,
therefore
angle 1 = 110°
angle 2 = 70°
angle 3= 110°
angle 4 = 70°
hope it helps
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