# Difference between revisions of "Intersect Tool"

From GeoGebra Manual

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<noinclude>{{Manual Page|version=5.0}}</noinclude> | <noinclude>{{Manual Page|version=5.0}}</noinclude> | ||

{{Tool|icon=Mode intersect.svg|name={{PAGENAME}}|type=point}} | {{Tool|icon=Mode intersect.svg|name={{PAGENAME}}|type=point}} | ||

− | : Intersection points of two objects can be created in two ways | + | : Intersection points of two objects can be created in two ways: |

:* Selecting two objects creates all intersection points (if possible). | :* Selecting two objects creates all intersection points (if possible). | ||

:* Directly clicking on an intersection of the two objects creates only this ''single intersection point''. | :* Directly clicking on an intersection of the two objects creates only this ''single intersection point''. | ||

− | : {{Note| Sometimes it's useful to display only the portions of the intersecating objects near the intersection point. To do so, open the | + | : {{Note| Sometimes it's useful to display only the portions of the intersecating objects near the intersection point. To do so, open the [[Properties Dialog]] of the intersection point, and check the option ''Show trimmed intersection lines'' in the ''Basic'' tab of the ''Properties'' dialog of the object, then hide the intersecting objects.}} |

==Outlying Intersections== | ==Outlying Intersections== | ||

For segments, rays, or arcs you may specify whether you want to ''Allow outlying intersections'' on tab ''Basic'' of the [[Properties Dialog]]. This can be used to get intersection points that lie on the extension of an object. For example, the extension of a segment or a ray is a straight line. | For segments, rays, or arcs you may specify whether you want to ''Allow outlying intersections'' on tab ''Basic'' of the [[Properties Dialog]]. This can be used to get intersection points that lie on the extension of an object. For example, the extension of a segment or a ray is a straight line. | ||

+ | <br> | ||

+ | {{note|See also [[Intersect Command|Intersect]] command.}} |

## Latest revision as of 09:45, 28 August 2015

- Intersection points of two objects can be created in two ways:
- Selecting two objects creates all intersection points (if possible).
- Directly clicking on an intersection of the two objects creates only this
*single intersection point*.

**Note:**Sometimes it's useful to display only the portions of the intersecating objects near the intersection point. To do so, open the Properties Dialog of the intersection point, and check the option*Show trimmed intersection lines*in the*Basic*tab of the*Properties*dialog of the object, then hide the intersecting objects.

## Outlying Intersections

For segments, rays, or arcs you may specify whether you want to *Allow outlying intersections* on tab *Basic* of the Properties Dialog. This can be used to get intersection points that lie on the extension of an object. For example, the extension of a segment or a ray is a straight line.

**Note:**See also Intersect command.

## Comments

## Use "Point Tool" for intersection[edit]

There is an other possibility to get an intersection point of two objects:

- Use the Point Tool and click directly on the (not yet existing) intersection point.

This is a possibility to get only one of two intersections of two circles, so that you have one point less. But it is not always working as wanted.

Try to change the option of the continuity behaviour of GeoGebra, if the selected intersection point position does not behave as wanted. Some more information here |