1.
The sagging windows are out of square in the old house.
这幢老房子的窗户都倾斜了，不成直角。
2.
a straight line that is not at right angles to a side.
与一条边不形成直角的直线。
3.
an angle that is not a right angle or a multiple of a right angle.
一个不是直角也不是直角的倍数的角。
4.
having or marked by bends or angles; not straight or aligned.
有弯曲、角度或以此为特征；不是直的或成列的。
5.
having four equal sides and four right angles or forming a right angle.
有四等边四直角的或构成一个直角。
6.
forming a right angle or containing one or more right angles.
构成一个直角或包含一个或多个直角。
7.
Line A crosses line B at right angles.
A 线与B 线成直角相交。
8.
These two lines form a right angle.
这两条线成一直角.
9.
The wall must be perpendicular to the floor.
墙壁必须与地板成直角。
10.
(geometry) forming a right angle.
（几何学）形成直角的。
11.
The angle is contained by the lines AB and AC.
此角由直线AB和ac构成。
12.
Without beating around the bush
直截了当，不拐弯抹角
13.
This box is out of true, its corners are not right angles
这个盒子不正，它的几个角都不是直角。
14.
intersecting at or forming right angles.
垂直的交叉或形成直角的。
15.
a straight line at right angles to another line.
与另一个线夹成直角的直线。
16.
Square the corners of a board.
使一块板的几个角成直角。
17.
A right triangle is formed by lines joining points SPQ.
SPQ三点联结后即构成一个直角三角形。
18.
Right-angle fold: Refer to folds that are at right-angles to each other.
直角摺:纸张的一摺和前一摺成直角的摺法。