成直角

• quartering
• on the square
• rectangularity

例句

1. 一条线与另一条线成直角相交。
   One line cuts another at right angles.
2. 这幢老房子的窗户都倾斜了，不成直角。
   The sagging windows are out of square in the old house.
3. 这条路成直角向左转去。
   The road turned square to the left.