劍橋詞典

one of two equal angles on opposite sides of a line that crosses two usually parallel lines (= lines that are always the same distance apart ), and on opposite sides of those lines
錯(cuò)角，交錯(cuò)角（交錯(cuò)角是兩個(gè)相等的角之一：平行的兩條線被第三條直線所截，這第三條直線的兩側(cè)就形成兩個(gè)相等的交錯(cuò)角，兩條平行線的兩側(cè)也各形成兩個(gè)交錯(cuò)角）
比較
corresponding angle 返回 alternate angle