An obtuse angle
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Obtuse?
A 160-degree angle is classified as an obtuse angle. In geometry, an obtuse angle is any angle that measures more than 90 degrees but less than 180 degrees. It falls between a right angle (90 degrees) and a straight angle (180 degrees).
An obtuse angle is an angle between 90 degrees and 180 degrees. A 180 degree angle is a straight horizontal line. So you can imagine that a 160 degree angle is almost but not quite horizontal.
Each interior angle measures 160 degrees
A regular octdecagon (18 sided geometric figure) was internal angles of 160 degrees.