亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數學考題練習:兩個相似三角形的相似比為2:3,它們的面積之差!

數學考題練習:兩個相似三角形的相似比為2:3,它們的面積之差

更新時間:2024-01-12 16:41:26作者:貝語網校

兩個相似三角形的相似比為2:3,它們的面積之差為25cm2,則較大三角形的面積是

A.75cm2

B.65cm2

C.50cm2

D.45cm2

試題答案

D

試題解析

根據相似三角形的性質,相似三角形面積的比等于相似比的平方,列出比例式后求解即可.

解答:∵兩個相似三角形的相似比為2:3,

∴面積之比為4:9,

設較大三角形的面積為x,

那么得到4:9=(x-25):x,

解得x=45cm2

故選D.

點評:本題考查對相似三角形性質的理解,相似三角形面積的比等于相似比的平方.

主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |