140 degrees is an obtuse angle because it's greater than 90 but less than 180 degrees
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A 140 degree angle would be called an obtuse angle.
No angle can be complementary to a 140 degree angle, as the sum of complementary angles is 90 degrees. But angles which are supplementary to each other add together to form a 180 degree angle.
140 degrees
An angle that equals 140 degrees would be considered an "obtuse" angle. This is because it is greater than 90 degrees but does not exceed a straight line of 180 degrees.
An angle of 140 degrees is an obtuse angle because it is greater than 90 but less than 180 degrees.