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歡迎您訪問數(shù)學考題練習:如圖,有兩棵樹,一棵高9米,另一棵高4米,兩樹!

數(shù)學考題練習:如圖,有兩棵樹,一棵高9米,另一棵高4米,兩樹

更新時間:2024-01-12 16:27:22作者:貝語網(wǎng)校

如圖,有兩棵樹,一棵高9米,另一棵高4米,兩樹相距12米.一只小鳥從一

棵樹的樹梢飛到另一棵樹的樹梢,至少飛了多少米?

A.11

B.12

C.13

D.14

試題答案

C

試題解析

根據(jù)“兩點之間線段最短”可知:小鳥沿著兩棵樹的頂端進行直線飛行,所行的路程最短,運用勾股定理可將兩點之間的距離求出.

解答:

建立數(shù)學模型,兩棵樹的高度差AC=9-4=5m,間距AB=DE=12m,

根據(jù)勾股定理可得:小鳥至少飛行的距離BC==13m.

故選C.

點評:本題主要考查了勾股定理的應用,解題的關鍵是將現(xiàn)實問題建立數(shù)學模型,運用數(shù)學知識進行求解,難度一般.

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