幫幫手!!我唔識呀!!
2010-11-30 8:18 am
回答 (5)
2010-11-30 8:31 am
✔ 最佳答案
ㄥB = 180° - ㄥE - ㄥD
= 180° - 90° - 30°
= 60°ㄥFCB
= 180° - ㄥA - ㄥB
= 180° - 35° - 60°
= 85°
2010-12-01 6:53 am
ㄥE=90゜(adjㄥ on st.line)
ㄥAFE+35゜+90゜=180゜(ㄥ sum of triangle)
ㄥAFE=55゜
ㄥCFD=55゜(vert .oppㄥ)
30゜+55゜+ㄥFCD=180゜(ㄥ sum of triangle)
ㄥFCD=95゜
ㄥFCB+95゜=180(adjㄥ on st.line)
ㄥFCB=85゜
有d複雜
希望幫到你la...=]
ㄥAFE+35゜+90゜=180゜(ㄥ sum of triangle)
ㄥAFE=55゜
ㄥCFD=55゜(vert .oppㄥ)
30゜+55゜+ㄥFCD=180゜(ㄥ sum of triangle)
ㄥFCD=95゜
ㄥFCB+95゜=180(adjㄥ on st.line)
ㄥFCB=85゜
有d複雜
希望幫到你la...=]
參考: 我...=]
2010-12-01 1:11 am
EBC+30+90=180(angle sum of tri)
EBC=60
60+35+FCB=180(angle sum of tri)
FCB=85
EBC=60
60+35+FCB=180(angle sum of tri)
FCB=85
2010-11-30 9:14 pm
sol
to know that ㄥb=60゜(ㄥ sum of triangle)
so ㄥbca=85゜(ㄥsum of triangle)
so ㄥFCB=85゜
2010-11-30 19:58:04 補充：
http://img140.imageshack.us/img140/1255/screenhunter03nov300032.gif
to know that ㄥb=60゜(ㄥ sum of triangle)
so ㄥbca=85゜(ㄥsum of triangle)
so ㄥFCB=85゜
2010-11-30 19:58:04 補充：
http://img140.imageshack.us/img140/1255/screenhunter03nov300032.gif
2010-11-30 8:33 am
收錄日期: 2021-04-21 22:17:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101130000051KK00023