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Is a 140 I think so angles on a straight line

Is a 140 I think so angles on a straight line-example-1
User Ute
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A straight line is 180 degrees

a = 180 - 40 \\ a = 140
User Neil P
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140 is not a straight line, it would be obtuse, 180 degrees is a straight angle
User Tempranova
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