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If the larger of two supplementary angles exceeds the smaller by 20° , then the angles are

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125°, 145°

150°, 130°

100°, 80°

120°, 100°

answer is A.

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Detailed Solution

x, y are two angles $(x > y)$

$x + y = 180 °, x = y + 20 °$

$\to y + 20 ° + y = 180 °$

$\to 2 y = 160 °$

$y = 80 °, x = 100 °$

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