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歡迎您訪問數學考題練習:已知兩個相似三角形的周長之比為1:3,則它們相!

數學考題練習:已知兩個相似三角形的周長之比為1:3,則它們相

更新時間:2024-01-12 12:59:45作者:貝語網校

已知兩個相似三角形的周長之比為1:3,則它們相應的面積之比是

A.3:1

B.1:3

C.9:1

D.1:9

試題答案

D

試題解析

根據相似三角形的性質:周長的比等于相似比,面積的比等于相似比的平方求解即可.

解答:∵兩個相似三角形的周長之比為l:3,

∴兩個相似三角形的相似比為l:3,

∴它們相應的面積之比是1:9.

故選D.

點評:本題考查對相似三角形性質的理解.(1)相似三角形周長的比等于相似比;(2)相似三角形面積的比等于相似比的平方.

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