An obtuse angle is an angle that measures greater than 90 degrees but less than 180 degrees. In other words, it is between a right angle (90 degrees) and a straight angle (180 degrees). Obtuse angles can be formed when two rays extend from a common point, or by the sides of 2D shapes (polygons) . Some examples of obtuse angles include:

• 110 degrees
• 135 degrees
• 145 degrees
• 150 degrees
• 168 degrees

It is important to have a clear idea about angle formation to understand obtuse angles. When two rays meet at a point, they form an angle. The two rays are called the arms of the angle, and the point is called the vertex. To draw an obtuse angle, we can use a protractor and mark any angle between 90 and 180 degrees.