Definition:Quadrilateral/Dart/Deltoid
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This page is about Deltoid in the context of Plane Geometry. For other uses, see 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.
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
Sources
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): deltoid: 1.