Perpendicular 垂点 - Object Snap 对象捕捉

Snaps to a point perpendicular to the selected geometric object 捕捉到垂直于所选几何对象的点

Can be Line to Line, Line to Circle, Line to Arc.

捕捉对象：线与线，线与园，线与圆弧

Status Bar > Object Snap - Perpendicular

状态栏 > 对象捕捉 - 垂点

Pick endpoint from a line

拾取直线的端点

Pointing down vertically and snap to the bottom line perpendicular

垂直向下以捕捉下面直线的垂点

Repeat the same steps for all the other lines

在其他直线上重复相同的步骤

Pick a point outside the arc

在圆弧外拾取一点

Snap to the arc perpendicularly

在圆弧上捕捉垂点

Pick a point outside the circle

在圆外拾取一点

Snap to the circle perpendicularly

在圆上捕捉垂点

Extend the line, it will go through the center of the circle

若延长直线，将穿过园的圆心