[color=#999999]This activity belongs to the [i]GeoGebra book[/i] [url=https://www.geogebra.org/m/sw2cat9w]GeoGebra Principia[/url].[/color][br][br][br]As we have seen before, the T-circle takes on a square shape (with diagonals parallel to the axes).[br][br]The T-ellipse generally has the shape of an octagon. If points A and B lie on the same vertical or horizontal line, it takes on a hexagonal shape. When the constant sum coincides with the T-distance from A to B, the ellipse degenerates into a rectangle with diagonal AB.[br][br]The T-parabola is generally formed by two rays (either horizontal or vertical) and two segments.[br][br]Finally, each branch of the T-hyperbola is generally formed by two rays (either horizontal or vertical) and one segment.

[color=#999999]Author of the construction of GeoGebra: [url=https://www.geogebra.org/u/rafael]Rafael Losada[/url].[/color]