Construct Tangent to a Circle
Videos and lessons to help High School students learn how to
construct a tangent line from a point outside a given circle to
Common Core: HSG-C.A.4
Construction - Tangent to a Circle From a Point Outside the Circle
How to draw the tangent lines to a circle when given a specific
point outside the circle.
Tangent through a point not on a circle
How to use a compass to construct a line tangent to a circle and
through a point NOT on the circle.
Tangents to a Circle
Tangents from a point outside a circle are congruent. Use the slider
or drag the orange point to change the figure.
Construction of Tangents to a circle
This applet shows how to construct tangents to a circle from a point
outside the circle.
Drag the Step Slider to see each step
Drag point B to change the radius of the circle and explore what
- when the point A is inside the circle?
- when the point A coincides with point M?
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