请输入您要查询的字词:

 

单词 Kite
释义

kite


A kite or deltoid is a quadrilateralMathworldPlanetmath with two pairs of equal sides, each pair consisting of adjacent sidesMathworldPlanetmathPlanetmath. Contrast with parallelogramsMathworldPlanetmath, where the equal sides are opposite.

The pairs of equal sides imply several properties:

  • One diagonalMathworldPlanetmath divides the kite into two isosceles trianglesMathworldPlanetmath, and the other divides the kite into two congruent triangles.

  • The angles between the sides of unequal length are equal. In the picture, they are both equal to the sum of the blue angle with the red angle.

  • The diagonals are perpendicularMathworldPlanetmathPlanetmathPlanetmath.

  • If d1 and d2 are the lengths of the diagonals, then the area is

    A=d1d22

    Alternatively, if a and b are the lengths of the sides, and θ the angle between unequal sides, then the area is

    A=absinθ.
  • A kite possesses an inscribed circle. That is, there exists a circle that is tangent (touches) the four sides.

  • Kites always possess at least one symmetryMathworldPlanetmath axis, being the diagonal that divides it into two congruent triangle.

When all the side lengths are the same, the kite becomes a rhombusMathworldPlanetmath, and when both diagonals have the same length, the kite becomes a square.

随便看

 

数学辞典收录了18232条数学词条,基本涵盖了常用数学知识及数学英语单词词组的翻译及用法,是数学学习的有利工具。

 

Copyright © 2000-2023 Newdu.com.com All Rights Reserved
更新时间:2025/5/4 19:21:13