http://2uploadhk.com/view/8843/S6003312.JPG
點樣做?
一題中四圓的演繹幾何
2009-04-11 2:01 am
回答 (2)
2009-04-11 2:23 am
✔ 最佳答案
OA = OB = OC = OD = radius of circle.since arc AB = arc CD, therefore, angle AOB = angle COD, so the 2 triangles are congruent (SAS). Since the 2 triangles are congruent, AB = CD.
2009-04-11 2:23 am
(a)
BO=CO
AO=DO
angle AOB= angle DOC
triangle ABO ~= triangle DCO (SAS)
(b)
AB=DC by part (a)
BO=CO
AO=DO
angle AOB= angle DOC
triangle ABO ~= triangle DCO (SAS)
(b)
AB=DC by part (a)
參考: 現象背後必然有原因
收錄日期: 2021-04-26 14:07:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090410000051KK01370