Definition of Obtuse Angle
Any angle greater than 90° and smaller than 180° is called an Obtuse Angle.
More About Obtuse Angle
- An angle of 90° is called a right angle.
- An angle of 180° is called a straight angle.
Example of Obtuse Angle
Video Examples: Acute and Obtuse Angles in Geometry
Solved Example on Obtuse Angle
Ques: Identify the obtuse angle in the given triangle.
Correct Answer: B
Step 1:An angle greater than a right angle and less than a straight angle (> 90° and < 180°) is called an obtuse angle.
Step 2: In the given figure, ∠A and ∠C are acute angles and ∠B is an obtuse angle.
Step 3: So, ∠ABC is an obtuse angle.