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Từ điển Oxford Advanced Learner 8th
alternate angles
alˌternate ˈangles 7 [alternate angles] BrE NAmE (also ˈZ angles) noun  plural (geometry)
equal angles formed on opposite sides of a line that crosses two parallel lines, in the position of the inner angles of a Z
compare ↑corresponding angles
See also: ↑Z angles
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