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梯形中位線的概念
梯形中位線的概念
更新时间:2024-11-30 08:08:59

梯形中位線的概念? 1.梯形中位線的概念(如圖1) (1)在梯形ABCD中,AD∥BC.,下面我們就來說一說關于梯形中位線的概念?我們一起去了解并探讨一下這個問題吧!

梯形中位線的概念(梯形中位線的概念)1

梯形中位線的概念

1.梯形中位線的概念(如圖1)

(1)在梯形ABCD中,AD∥BC.

∵E為_______邊的中點,F為_______邊的中點,

∴EF是梯形ABCD的_______.

(2)梯形ABCD有_______條中位線.

2.梯形中位線的性質(如圖2)

(1)圖形之間的轉換

E、F分别為AB、DC的中點,将△ADF繞點_______旋轉

_______度可得到△_______,由中心對稱可知AD=_______,

此時,我們可将梯形ABCD的中位線EF轉化為△_______的中

位線.

(2)性質:∵EF為梯形ABCD的中位線,

∴EF∥_______∥_______,EF=_______.

叙述為:_______________________________________________________________.

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