[null, {"document_url": "https://www.geogebra.org/m/eEUrmKNJ", "unformatted_src": "https://www.geogebra.org/resource/eEUrmKNJ/xZNto11TaBComDpF/material-eEUrmKNJ.png", "src": "https://www.geogebra.org/resource/eEUrmKNJ/xZNto11TaBComDpF/material-eEUrmKNJ.png", "formatted_filename": "material eEUrmKNJ", "alt_text": "GeoGebra Applet"}, null]
A Triangle and its Circumcircle


Circle, Circumcircle or Circumscribed Circle

This applet demonstrates the construction of the circumcircle of a given triangle ABC. The perpendicular bisectors of the sides of triangle ABC intersect at a point F. It can be shown that the distance from F to each of the points A, B, and C is the same; call this value r. Therefore, the circle with center F and radius r passes through all three points A, B and C. In the applet, you may click and drag the points A, B, and C; the corresponding triangle and its circumcircle will be drawn.


