Definition:Quadrilateral/Dart/Deltoid

Definition
A deltoid is a dart such that:
 * the $2$ sides which are adjacent to the reflex angle are equal to each other
 * the other $2$ sides are also equal to each other.


 * Darts.png

In the above diagram, the figure on the right is a deltoid.

Also known as
Some sources use the term dart to refer to a deltoid.

Also see

 * Definition:Dart
 * Definition:Kite