部落格

標題:

數學關於vector?

發問:

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。

最佳解答:

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

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此文章來自奇摩知識+如有不便請留言告知

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.