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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

1.
Open Graphics View under GeoGebra icon View in GeoGebra icon Menu.
2.
Click Tangents GeoGebra icon by first clicking tool number 4, then tool number 5 in the drop-down list.
3.
Click on the point.
4.
Click on the circle.

Screenshot of GeoGebra showing the tangent to a circle at point

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