**** A
*****/I\
****/*I*\
***-/* I* \
***/**I** \
**/***IO**\
B/***I*****\C
**--------------
D
(*is space ,and there are lines linking OB and OC in the figure)
In the figure,▼ABC is equilateral,AD is an altitude,O is the circumcentre of th triangle.If AB=18 cm,find OA+OB+OC,leaving your answer in surd form.
F3 Maths--Deductive Geometry(10分!!!!)
2008-08-23 6:40 pm
回答 (1)
2008-08-25 9:16 am
✔ 最佳答案
The answer is as follows:圖片參考：http://i277.photobucket.com/albums/kk75/uncle_michael/080825_mat_1.jpg?t=1219598120
收錄日期: 2021-04-23 23:06:41
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