Class of non-convex quadrilaterals that have two pairs of adjacent congruent sides.
A deltoid is sometimes called a chevron.
Examples
Properties
- The diagonals of a deltoid are perpendicular to each other.
- A deltoid has an axis of symmetry that contains one of the diagonals of the figure.
The other diagonal is located outside the figure.
Formula
The area A of a deltoid with diagonals d and D is : A = (d × D) ÷ 2.