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歡迎您訪問每日一練:下面幾組條件中,能判斷一個四邊形是平行四邊形的是!

每日一練:下面幾組條件中,能判斷一個四邊形是平行四邊形的是

更新時間:2024-01-12 12:51:39作者:貝語網校

下面幾組條件中,能判斷一個四邊形是平行四邊形的是

A.一組對邊相等

B.兩條對角線互相平分

C.一組對邊平行

D.兩條對角線互相垂直

試題答案

B

試題解析

分析:平行四邊形的五種判定方法分別是:(1)兩組對邊分別平行的四邊形是平行四邊形;

(2)兩組對邊分別相等的四邊形是平行四邊形;

(3)一組對邊平行且相等的四邊形是平行四邊形;

(4)兩組對角分別相等的四邊形是平行四邊形;

(5)對角線互相平分的四邊形是平行四邊形.根據平行四邊形的判定方法,采用排除法,逐項分析判斷.

解答:A、一組對邊相等,不能判斷,故錯誤;

B、兩條對角線互相平分,能判斷,故正確;

C、一組對邊平行,不能判斷,故錯誤;

D、兩條對角線互相垂直,不能判斷,故錯誤.故選B.

點評:本題考查了平行四邊形的判定,平行四邊形的判別方法是說明一個四邊形為平行四邊形的理論依據,在應用判定定理判定平行四邊形時,應仔細觀察題目所給的條件,仔細選擇適合于題目的判定方法進行解答,避免混用判定方法.

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