A kite is a planar convex quadrilateral consisting of two adjacent sides of length 
and the other two sides of length 
.
The rhombus is a special case of the kite, and the lozenge is a special case of the rhombus.
The area of a kite is given by
 |
(1)
|
where
 |  |  |
(2)
|
 |  |  |
(3)
|
are the lengths of the polygon diagonals (which are perpendicular).
The 120-90-60-90 kite with edge ratios 
is the basis for the polyomino-like
objects known as polykites.
"Kite" is also the name given to the Penrose tile illustrated above.
