corresponding angles
noun [ plural ] mathematics specialized uk/ˌkɒr.ɪˌspɒn.dɪŋ ˈæŋ.ɡəlz/ us/ˌkɔːr.əˌspɑːn.dɪŋ ˈæŋ.ɡəlz/
（复数）同位角
two equal angles on the same side of a line that crosses two parallel lines and on the same side of each parallel line