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GeoGebra Classroom

Inversion

Autore:Irina Boyadzhiev

In the plane, the inverse of a point

with respect to a circle with center

and radius

is a point

such that

and

are on the same ray with an endpoint

, and

. Explore the inverse of a point, line, circle and a polygon:

Click on a button to show/hide an object.
Move the object by pointing to it and dragging it.
Try different position of the object with respect to the circle (outside, inside, intersecting, tangent etc.)

All original objects are blue and the images are red.

In the plane, the inverse of a point

with respect to a circle with center

and radius

is a point

such that

and

are on the same ray with an endpoint

, and

. Explore the inverse of a point, line, circle and a polygon:

Click on a button to show/hide an object.
Move the object by pointing to it and dragging it.
Try different position of the object with respect to the circle (outside, inside, intersecting, tangent etc.)

All original objects are blue and the images are red.

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