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An angle is 40° less than its supplement.
Find the angle.

Class 7Complementary and Supplementary AnglesLines and Angles

A63
B70
C77
D140

Step-by-Step Solution

Let the angle be

x

, supplement is 180° −

x

. Then

x

= (180° −

x

) − 40°, so

2 x = 140

°,

x = 70

°.

Answer: B) 70

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