White H House of Math logo on multicolored square

Constructing the Tangents to a Circle in GeoGebra

You can use GeoGebra to construct the tangents to a circle. The instructions are the same whether you construct the tangent at a point on the circle boundary, or you construct the tangents passing through a point outside the circle.

GeoGebra Instruction 1

Open Graphics View under GeoGebra icon View in GeoGebra icon Menu.
Click Tangents GeoGebra icon by first clicking tool number 4, then tool number 5 in the drop-down list.
Click on the point.
Click on the circle.

Screenshot of GeoGebra showing the tangent to a circle at point

Want to know more?Sign UpIt's free!