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.
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.
A 90 degree angle is a right angle
2
A 90 degree angle is formed at a right angle.
45 degree angle
A 145-degree angle is an obtuse angle, meaning it is greater than 90 degrees but less than 180 degrees. It is formed when two lines intersect and the angle between them measures 145 degrees. In geometric terms, a 145-degree angle is classified as an obtuse angle due to its measurement falling between 90 and 180 degrees.
A reflex angle.
Two 20 degree acute angles will be formed.
It is a 90 degree angle, which can be formed by two perpendicular lines.
An obtuse angle
When two plain mirrors are placed at a 150-degree angle, multiple images are formed. The number of images formed can be calculated using the formula: ( \text{Number of images} = \frac{360}{\text{angle between the mirrors}} - 1 ). In this case, with a 150-degree angle, the calculation would be ( \frac{360}{150} - 1 = 2 ) images are formed.
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.
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.