Definition of alternate angles in English:

alternate angles

plural noun

Mathematics
  • Two angles, not adjoining one another, that are formed on opposite sides of a line that intersects two other lines. If the original two lines are parallel, the alternate angles are equal.

    • ‘So in the figure above, as you move points A or B, the two alternate angles shown always have the same measure.’
    • ‘The cross-ply tyre is made up of superimposed layers of textile cord running at alternate angles from bead to bead.’

Pronunciation

alternate angles

/ˈɔltərˌneɪt ˈæŋɡəlz//ˈôltərˌnāt ˈaNGɡəlz/