A diamond ABCD which is formed by four vector AB, BC ,AD and DC where AB= 3i+12j, The length of all vectors are equal while AB// DC and BC// AD
a) Find the length of each vector of the diamond
b)Find the angles A, B , C and D of the diamond
c)Prove that the diagonals of the diamond are perpendicular
步驟唔該。
數學關於vector?
2012-01-05 9:34 am
回答 (2)
2012-01-06 1:56 am
✔ 最佳答案
圖片參考：http://imgcld.yimg.com/8/n/HA00285646/o/701201050006713873419091.jpg
"so, angles are not possible to be found"
2012-01-05 17:57:42 補充：
full size:
http://s14.postimage.org/nod8u0orj/daum_equation_1325757229798.png
2012-01-05 4:40 pm
Need the direction of one more vector, BC or AD, to define the angles. Without it, you can only say angle A = angle C, angle B = angle D. Also, we call this a rhombus.
收錄日期: 2021-04-25 22:38:26
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https://hk.answers.yahoo.com/question/index?qid=20120105000051KK00067