凧 定義
A kite is a planar convex quadrilateral consisting of two adjacent sides of length a and the other two sides of length b that are congruent. It is notable that the diagonals of a kite are perpendicular. The rhombus is a special case of the kite, and the lozenge is a special case of the rhombus. Below is an example of a kite.
面積
カイトの面積はA= 1 ＆frasl; 2 pqで与えられます。ここで、p = ＆radic; ＆nbsp; a 2 -h 2 ＆nbsp; + ＆radic; ＆nbsp; b 2 - h 2 ＆nbsp; およびq=2hは、ポリゴンの対角線（垂直）の長さです。エッジ比が
到
“Kite.” From Wolfram MathWorld, mathworld.wolfram.com/Kite.html.
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