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歡迎您訪問數(shù)學(xué)考題練習(xí):一個等腰三角形的周長是16,底邊上的高是4,則!

數(shù)學(xué)考題練習(xí):一個等腰三角形的周長是16,底邊上的高是4,則

更新時間:2024-01-12 12:58:51作者:貝語網(wǎng)校

一個等腰三角形的周長是16,底邊上的高是4,則這個三角形的底邊長是 ________.

試題答案

6

試題解析

設(shè)出底邊的長和腰的長,利用勾股定理和周長列出兩個等式,將設(shè)出的底邊的長求出來即可.

解答:設(shè)腰長為x,底邊長為2y,

則2x+2y=16,42+y2=x2

由此可解得y=3,

故底邊長為6.

故答案為:6.

點評:本題考查了勾股定理的相關(guān)知識,解題的關(guān)鍵是根據(jù)設(shè)出兩個未知數(shù)并利用勾股定理和周長列出兩個關(guān)系式求解.

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