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    I need to work out what co-ordinate a point takes this point is expressed by
    (4,6) +1.41 units along the line y=-x+10 with x descending

    I hope my explanation makes sense
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    It's (3, 7) if 1.41 = rt(2)
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    (Original post by BCHL85)
    It's (3, 7) if 1.41 = rt(2)
    of course, sorry i just didnt see it,

    can i just check something,
    if the line was y=2x+2 and i needed to see where a line 5 units long from the point (1,4) finished. would I do th e following
    5²=25
    25/3=8.333 etc
    8.333*2=16.66666
    √8.333 and √16.666 to give the relative additions to to the coordinate (1,4)
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    can someone confirm that the technique I have used in the previous post is correct
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    y = 2x+2
    5 units from (1,4)
    (1+k, 4+2k) is the required point.
    Also k² + (2k)² = 5² (pythagoras)
    k = ±√5
    So the required point is (1±√5, 4±2√5)
 
 
 
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