Obtuse Angle
An angle with a degree measure greater than 90°.
An obtuse angle is an angle that measures greater than 90 degrees but less than 180 degrees. It is a type of angle that is wider than a right angle (90 degrees) but narrower than a straight angle (180 degrees).
The term obtuse comes from the Latin word obtusus, which means blunt or dull. An obtuse angle can be thought of as a blunt angle, as opposed to an acute angle, which is a sharp angle.
To measure an angle and determine if it is obtuse, you can use a protractor. Place the protractor on the angle so that the base line of the protractor aligns with one of the sides of the angle. Then, read the measurement on the protractor. If the measurement is greater than 90 degrees but less than 180 degrees, then the angle is obtuse.
Examples of obtuse angles include 110 degrees, 135 degrees, and 170 degrees. These angles are wider than a right angle but do not form a straight line. It is important to understand the properties of obtuse angles in geometry, as they play a crucial role in numerous geometric concepts, such as triangles and polygons.
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