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GeoGebraGeoGebra Classroom

Create a Tangent to a Circle Through a Given Point on the Circle

1) Use the Line toolToolbar Image to create a line between the center of the circle and the point on the circle. 2) Create a line perpendicular to the one you just created through the point on the circle. 3) Use the Angle Measure toolToolbar Image to verify that this new line is perpendicular to the first one.