单词学习：complementary angles 数学/几何
complementary angles
/ˌkɒmplɪˈment(ə)ri ˈæŋɡ(ə)lz/
互补角
Mr. Gu explained that complementary angles are two angles whose measures add up to 90 degrees.
顾老师解释说，互补角是两个角度数之和为90度的角。
单词卡片
卡片已就绪
