What Is an Obtuse Angle?
Interactive Exercise Worksheet
Here are three randomly selected questions from a larger exercise, which can be edited and sent via e-mail to students or printed to create exercise worksheets.
(Editable, Printable, and Sendable)
What Is an Obtuse Angle? (The Lesson)
An obtuse angle is an angle greater than 90° and less than 180°.
An obtuse angle is greater than a right angle and less than a straight line.
The Oxford English Dictionary defines an obtuse angle as "a plane angle: greater than 90 degrees and less than 180 degrees."
Real Examples of Obtuse Angles
The angles below are all obtuse angles: