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歡迎您訪問數學考題練習:如圖,某公園有一塊矩形草地ABCD,矩形草地的!

數學考題練習:如圖,某公園有一塊矩形草地ABCD,矩形草地的

更新時間:2024-01-12 16:41:26作者:貝語網校

如圖,某公園有一塊矩形草地ABCD,矩形草地的邊及對角線BD是小路,BC長40米,CD長30米.媽媽站在A處,亮亮沿著小路B?C?D?B跑步.在跑步過程中,亮亮與媽媽之間的最短距離為________米.

試題答案

24

試題解析

過A向BD作垂線段,垂線段長即為最短距離.

解答:比較可得最短的應該是A到BD邊的高線,因為BC=40米,CD=30米,

由勾股定理得,BD=50米,

由面積公式得,AB•AD=BD•高,

解得:高為24米,

即亮亮與媽媽之間的最短距離為24米.

點評:此題考查了學生對勾股定理在實際生活中的運用能力及三角形的面積公式的掌握情況.

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