An angle of 140 degrees is an obtuse angle because it is greater than 90 but less than 180 degrees.
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A 140 degree angle would be called an obtuse angle.
A 140 degree angle is about half way between a 90 degree angle, which has lines that are perpendicular to each other, and a 180 degree angle, which is a straight line. A 140 degree angle is an obtuse angle which has a line a little over half way between the 90 degree and 180 degree angles.
140 degrees
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.
Answer = A 180 degree angle is called a Straight Angle!!