four points A(-1,2) B(4,1) C(-2,-1) D(3,h)
find the value of h if AB is parallel to CD
show your steps
簡單數學題，急！
2011-04-17 2:52 am
回答 (1)
2011-04-17 4:50 am
✔ 最佳答案
Gradient of AB is,=[1-2]/[4-(-1)]
=-(1/5)
Gradient of CD is,
={h-(-1)]/[3-(-2)]
=(h+1)/5
If CD is parallel to AB,
Gradient of AB=Gradient of CD.
So,
-(1/5)=(h+1)/5
-1=h+1
h=-
2011-04-16 20:53:47 補充：
****h=-2
i hope this can help u
參考: mememememememememe
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