In the xy-coordinate plane,lines L and Q are perpendicular.I

李财狂_vv2022-10-04 11:39:543条回答

In the xy-coordinate plane,lines L and Q are perpendicular.If line L contains the points (0,0) and (2,1),and line Q contains the points (2,1) and (0,T),what is the value of

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mythwdb 共回答了11个问题 | 采纳率100%
L和Q 垂直.
L 过(0 0) (2,1)所以L 这条线是y=0.5x,所以Q的斜率是-2,对吧.因为垂直 斜率是负倒数.
Q过(2,1)(0,t)所以-2(2)+t=1 推出t=5
那个题我帮你答了,自己去链接看.
1年前
没有说出的爱 共回答了13个问题 | 采纳率
∵lines L and Q are perpendicular
∴KL·KQ=-1
∴(1-0/2-0) ·(T-1/0-2)= —1
∴T=5
1年前
michae-l1 共回答了6个问题 | 采纳率
L过(0,0),(2,1)
可以知道L:y=1/2x
Q和L是垂直的,同时截距是T(过0,T点),Q:y=-2x+T
Q过(2,1)点,可以求的T=5
1年前

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