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歡迎您訪問數學考題練習:一個正方形的外接圓半徑與其內切圓半徑之比是__!

數學考題練習:一個正方形的外接圓半徑與其內切圓半徑之比是__

更新時間:2024-01-12 16:34:11作者:貝語網校

一個正方形的外接圓半徑與其內切圓半徑之比是________.

試題答案

:1

試題解析

根據題意畫出圖形,再由正方形及等腰直角三角形的性質求解即可.

解答:解:如圖所示,

連接OA、OE,

∵AB是小圓的切線,

∴OE⊥AB,

∵四邊形ABCD是正方形,

∴AE=OE,

∴△AOE是等腰直角三角形,

設AE=x,

則OA===x,

故==.

故答案為::1.

點評:本題考查的是正方形的性質及勾股定理.根據題意畫出圖形,利用數形結合求出答案是解答此題的關鍵.

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