alternate angles

American  

plural noun

Geometry.

1. two nonadjacent angles made by the crossing of two lines by a third line, both angles being either interior or exterior, and being on opposite sides of the third line.

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alternate angles British  

plural noun

1. two angles at opposite ends and on opposite sides of a transversal cutting two lines

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alternate angles Scientific  

1. Two angles formed on opposite sides of a line that crosses two other lines. The angles are both exterior or both interior, but not adjacent.

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Etymology

Origin of alternate angles

First recorded in 1650–60

Example Sentences

See Examples For:

alternate angles

Two cameramen crouch in front, capturing him from alternate angles — one locked on his made-for-TV visage and the other set to pan across his body once he starts delivering his lines.

From Los Angeles Times ● Aug. 28, 2022

DW: You could see in some of those alternate angles how clear of an angle Crowder had to see the rim.

From Los Angeles Times ● Jun. 24, 2021

Six holes play right on the shoreline, and every hole offer genuine alternate angles of attack.

From Golf Digest ● Jan. 11, 2018

And “if the lines are parallel, are alternate angles necessarily equal?”

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various

Euclid introduced the subject by the proposition that, if alternate angles are equal, the lines are parallel.

From The Teaching of Geometry by Smith, David Eugene