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歡迎您訪問數學考題練習:如圖,把一張長方形紙條ABCD沿EF折疊,若∠!

數學考題練習:如圖,把一張長方形紙條ABCD沿EF折疊,若∠

更新時間:2024-01-12 16:27:54作者:貝語網校

如圖,把一張長方形紙條ABCD沿EF折疊,若∠1=56°,則∠EGF應為

A.68°

B.34°

C.56°

D.不能確定

試題答案

A

試題解析

本題根據平行線的性質和翻折的性質,求解即可.

解答:因為折疊,且∠1=56°,

所以∠C′FB=180°-2×56°=68°,

∵D′E∥C′F,

∴∠EGF=∠C′FB=68°.

故選A.

點評:本題重點考查了平行線的性質及折疊問題,是一道較為簡單的題目.

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