Plane Geometry Question x1
2010-09-10 5:27 am
圖片參考：http://imgcld.yimg.com/8/n/HA00543461/o/701009090125113873370650.jpg
In the figure,Angle ACB=54,AD and BD are the angle bisector of angle BAC
and angle ABC respectively . Find Angle ADB.
回答 (1)
2010-09-10 5:43 am
✔ 最佳答案
ㄥADB + ㄥDAB + ㄥDBA = 180° ......(1)ㄥBAC + ㄥABC + 54° = 180°
==>
2(ㄥDAB + ㄥDBA ) + 54°= 180ㄥDAB + ㄥDBA = 63° , sub it to (1) :ㄥADB + 63° = 180°ㄥADB = 117°
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https://hk.answers.yahoo.com/question/index?qid=20100909000051KK01251