Math question: Please HELP

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Amelia_P
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#1
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#1
ABCD is a trapezium where A is the point (1,-2), B is the point (7,1) and C is the point (3,4).
DC is parallel to AB
AD is perpendicular to AB
Find the equation of the line CD.
--- I've tried drawing a graph but I just don't understand how to get the point D -- Please help.
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mqb2766
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Can you upload what you sketched?
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Amelia_P
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S

(Original post by mqb2766)
Can you upload what you sketched?
sorry, it's fine I think i figured it out now. I did the equation of AB as its parallel, then figured out the equation of DC. And used trial an error to find D. XD
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mqb2766
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(Original post by Amelia_P)
S


sorry, it's fine I think i figured it out now. I did the equation of AB as its parallel, then figured out the equation of DC. And used trial an error to find D. XD
Shouldnt have needed trial and error, but its worth doing if you can't come up with another method.
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Amelia_P
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(Original post by mqb2766)
Shouldnt have needed trial and error, but its worth doing if you can't come up with another method.
Very true I kind of rearranged the equation a bit to find a value.
Last edited by Amelia_P; 3 months ago
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mqb2766
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#6
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(Original post by Amelia_P)
Very true I kind of rearranged the equation a bit to find a value.
Upload what youve done if you want. If you're happy with it, no problem.
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