1) In triangleABC , AB = BC. The angle bisector of angleABC is drawn to meet AC at D. A line from D is drawn to meet BC at E such that AD = DE. If DE//AB, find angleDCE.
2) In triangleABC , AC = AB. A live which is perpendicular to BC is drawn from A to meet BC at D. From B , a line is drawn to meet AD produced at E such that AE = AB. If AC // BE, find angleEBD.
急!!計呢兩條數...
2008-03-04 6:30 am
回答 (2)
2008-03-04 7:52 pm
✔ 最佳答案
As follows: Figure 1 is for Q1 and figure 2 for Q2.
圖片參考：http://i238.photobucket.com/albums/ff245/chocolate328154/Maths200.jpg?t=1204602748
參考: My Maths Knowledge
2008-03-08 7:31 pm
1) Angle DCE = 60*
2) Angle EBD = 30*
2) Angle EBD = 30*
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