obtuse angle

noun

plural obtuse angles

mathematics

: an angle (see angle entry 1 sense 1a) measuring greater than 90 degrees and less than 180 degrees

… the honeybee is always very precise in constructing honeycomb hexagons, with an obtuse angle of 109 degrees and an acute angle of 70 degrees.

—Dianne Brady

The winglets jut out at an obtuse angle from both sides of the craft's main shaft.

—Jeanne Albanese

The center was built in two sections that join at an obtuse angle.

—Dave DeWitte

compare acute angle, right angle

Word History

First Known Use

1570, in the meaning defined above