en.wikipedia.org/wiki/Acute_and_obtuse_triangles

An acute triangle is a triangle with all three angles acute (less than 90°). An obtuse triangle is one with one obtuse angle (greater than 90°) and two acute angles ...

simple.wikipedia.org/wiki/Obtuse_angle

An obtuse angle is a form of angle that measures wider than 90° and less than 180°. It is bigger than an acute angle. You can measure angles with a protractor.

www.mathsisfun.com/obtuse.html

Obtuse Angles. Different Angles have different names: types of angle. An Obtuse Angle is more than 90° but less than 180°. Obtuse Angle This is an obtuse ...

www.mathsisfun.com/angles.html

In One Diagram. This diagram might make it easier to remember: Also: Acute, Obtuse and Reflex are in alphabetical order. angle types together ...

www.mathsisfun.com/definitions/obtuse-angle.html

Obtuse Angle. more ... Obtuse Angle. An obtuse angle is one which is more than 90° but less than 180° In other words, it is between a right angle and a straight ...

study.com/academy/lesson/what-is-an-obtuse-angle-definition-examples.html

In this lesson, you'll learn what angles, right angles, and obtuse angles are; and you'll see a few examples of different obtuse angles. Then test...

www.khanacademy.org/math/basic-geo/basic-geo-angle/basic-geo-angle-types/v/acute-right-and-obtuse-angles

Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees. Learn about angles types and ...

www.dictionary.com/browse/obtuse-angle

Obtuse angle definition, an angle greater than 90° but less than 180°. See more.

www.mathopenref.com/angleobtuse.html

Definition of an obtuse angle. An angle between (but not including) 90 deg and 180 deg.