1. Open the CAD software and click "Start Drawing";
2. Click the "straight line" in the upper left corner, or enter the "l" command;
3. Click the left key to confirm a point, and press "Shift+Alt" to enter the length you want to draw;
4. press "Shift+"
5. Enter the required angle. The angle starts with the X axis of the coordinate axis as 0 degrees, and the desired diagonal is obtained after confirmation.
There are two methods to draw diagonal lines in CAD. One is to determine that two endpoints are directly connected by line segments, and the other is to draw diagonal lines directly with known diagonal angles and lengths.
The second method of drawing diagonal in cad;
1, according to the orthogonal mode of CAD, the shortcut key is F8;
2. Enter the line command l, and then click the first point. At this time, you will find that the drawn lines are parallel and perpendicular to the coordinate axis;
3. Enter the required size and click the space to confirm;
4. Enter the command RO, and select a point of the line after the space;
5. Finally, enter the required angle, and you will get the required line after the space is determined.