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straight angle

American  

noun

  1. the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one half of the circle; an angle of 180°.


straight angle British  

noun

  1. an angle of 180°

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

straight angle Scientific  
/ strāt /
  1. An angle having a measure of 180°.


Etymology

Origin of straight angle

First recorded in 1595–1605

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“There wasn’t a straight angle in the whole building,” Mr. Easter said.

From New York Times • Apr. 12, 2010

Citing everything from the Milky Way to a doughnut, Mr. Fujiwara made straight angle tailoring credible, as well as the rounded version of the wind coats that Mr. Miyake invented three decades ago.

From New York Times • Mar. 5, 2010

The terms "complement," "supplement," and "conjugate," meaning the difference between a given angle and a right angle, straight angle, and perigon respectively, have also entered our vocabulary and need defining.

From The Teaching of Geometry by Smith, David Eugene

Welding Angle Iron.—Let it be required to form a piece of straight angle iron to a right angle.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

This was excluded by the Greeks because their idea of angle required it to be less than a straight angle.

From The Teaching of Geometry by Smith, David Eugene

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