Illustration of alternate angle
- alternate interior angles a
- a′
- b
- b′; alternate exterior angles c
- c′
- d
- d′
alternate angle
noun
: one of a pair of angles with different vertices and on opposite sides of a transversal at its intersection with two other lines:
a
: one of a pair of angles inside the two intersected lines
called also alternate interior angle
b
: one of a pair of angles outside the two intersected lines
called also alternate exterior angle
Example Sentences
Recent Examples on the Web Check out the alternate angle from one of our two AL.com videographers on the field for the game. 
Michael Casagrande | Mcasagrande@al.com, al, 5 Sep. 2021 Also, notice that the tops of the cutting teeth are ground at alternating angles, meaning one tooth angles to the left, the next to the right. Joseph Truini, Popular Mechanics, 24 July 2019
Michael Casagrande | Mcasagrande@al.com, al, 5 Sep. 2021 Also, notice that the tops of the cutting teeth are ground at alternating angles, meaning one tooth angles to the left, the next to the right. Joseph Truini, Popular Mechanics, 24 July 2019 Word History
First Known Use
1570, in the meaning defined above