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An obtuse angle
An angle whose degree measure is between 0 and 90 is an acute angle. An angle whose degree measure is between 90 and 180 is an obtuse angle. These are basic properties of geometry.
20 degrees.
An angle is formed when two lines meet at a point.
Right angles - or 90 degree angles.
A 90 degree angle is a right angle
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A 90 degree angle is formed at a right angle.
45 degree angle
Two 20 degree acute angles will be formed.
A reflex angle.
It is a 90 degree angle, which can be formed by two perpendicular lines.
180 Degree.
15 degrees. A bisected 60 degree angle makes 2 30 degree angles by definition of an angle bisector, then a 30 degree angle makes 2 15 degree angles by definition of an angle bisector.
An obtuse angle
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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.