Relation 指令
来自GeoGebra Manual
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- Relation[ <Object>, <Object> ]
- Relation[Object a, Object b]
- Shows a message box that gives you information about the relation between object a and object b.
This command allows you to find out whether
- two lines are perpendicular
- two lines are parallel
- two objects are equal
- a point lies on a line or conic
- a line is tangent or a passing line to a conic.
备注: See also Relation tool.