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A Reflex Angle is more than 180° but less than 360°
A zero degree angle is not the same as a 180 degree angle -- no more than a90 degree angle is the same as a 270 degree angle.It's not. An angle of zero is the same as an angle of 360 degrees. In fact, if you startwith any angle, and add or subtract 360 degrees from it, you wind up with the sameangle as the original one.
The sum of the angles in a trapezoid is 360 degrees, therefore, the forth angle in this problem is: 360 - (60+120+80) = 100 degrees
Answer = A 180 degree angle is called a Straight Angle!!
what is a 90 degree angle called