A 120-degree angle is an obtuse angle, which means it is greater than 90 degrees but less than 180 degrees. To visualize a 120-degree angle, imagine a clock face where the minute hand points to the 4 and the hour hand points to the 2. The angle between the hour and minute hands would be approximately 120 degrees.
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Well. Let's say you have a horizontal line (straight from one side to the other). If you had a 90 degrees angle it would go straight up, and 180 is straight to the side. Therefore 120 degrees would be something between that, a bit closer to straight up than straight to the side.
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A 120 degree angle is obtuse because it is greater than 90 but less than 180 degrees and it is 1/3 of a full turn.
An Obtuse Triangle
180 - 60 = 120 degrees.
Well, isn't that a happy little triangle Tyler has there! To find the measure of the third angle, we can use the fact that the sum of all angles in a triangle is always 180 degrees. So, if we add 35 and 85 together, we get 120 degrees. Subtracting that from 180 degrees leaves us with 60 degrees for the measure of the third angle. Happy painting, my friend!
The interior angle of a regular hexagon is 120 degrees.