Category:Diagonal Points

This category contains results about Diagonal Points.
Definitions specific to this category can be found in Definitions/Diagonal Points.

Let $A$, $B$, $C$ and $D$ be the points of a complete quadrangle $ABCD$.

The diagonal points of $ABCD$ are the points of intersection of the lines:

$AB$ and $CD$

$AC$ and $BD$

$AD$ and $BC$.