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上面果張係圖
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唔該晒
中3~數學~全等3角形証明
2006-11-06 2:25 am
回答 (3)
2006-11-06 2:36 am
✔ 最佳答案
畢氏定理:AB=DC so dc = 8
8平方 +15 平方 = BC的平方
64+225 =BC平方
289 = BC平方
so...BC = 289的開方
BC = 17
FINISH!! 你幾年班AR?? 中二 ??
2006-11-05 18:38:58 補充：
AC = BD = 15AB = 88square 15square = BC square289 = bc square289 square root = BC BC = 17
2006-11-06 3:14 am
a)AB =DC(given)
AD =AD(given)
angleABD=angleDCA
triangle ABD = triangle DAC(SAS)
so, AC=BD
b)triangle ABD = triangle DAC(proved in (a))
AC=BD=15 (given)
AB=8(given)
AB 2次方＋AC 2次方 = BC 2次方
8 2次方＋15 2次方 = BC 2次方
64＋225=BC 2次方
289=BC 2次方
BC=17
AD =AD(given)
angleABD=angleDCA
triangle ABD = triangle DAC(SAS)
so, AC=BD
b)triangle ABD = triangle DAC(proved in (a))
AC=BD=15 (given)
AB=8(given)
AB 2次方＋AC 2次方 = BC 2次方
8 2次方＋15 2次方 = BC 2次方
64＋225=BC 2次方
289=BC 2次方
BC=17
2006-11-06 3:05 am
a)
AB =DC (given)
AD =AD (given)
AB =DC (given)
AD =AD (given)
收錄日期: 2021-04-13 14:46:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061105000051KK04407