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Maths Question

Discussion in 'General Chat' started by Jack.Cork, Nov 15, 2011.

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  1. Jack.Cork

    Jack.Cork New Member

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    11) The point D, E and F have co-ordinates (-2,0), (0,-1) and (2,3) respectively.
    i) calculate the gradient of DE
    ii) Find the equation of the line through F, parallel to DE giving your answer in the from ax+by+c=0
    iii) By calculating the gradient of EF, show that DEF is a right angled triangle.
    iv) Calculate the length of DF
    v) use the results of parts iii) and iv) to show that the equation of the circle which passes through D, E and F is given by the equation: x^2+y^2-3y-4=0
     
    #1
    Jack.Cork, Nov 15, 2011
  2. SaintsForTheWin

    SaintsForTheWin Any holes a goal

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    pm me. I'll help you.
     
    #2
    SaintsForTheWin, Nov 15, 2011
  3. Hash.

    Hash. pure daycent

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    [NSFW]
    please log in to view this image
    [/NSFW]
     
    #3
    Hash., Nov 15, 2011
  4. - jordan -

    - jordan - Active Member

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    37.112
     
    #4
    - jordan -, Nov 15, 2011
  5. jenthesaint1990

    jenthesaint1990 Well-Known Member

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    hash you're being very naughty this evening.
     
    #5
    jenthesaint1990, Nov 15, 2011
  6. Natchrawldry

    Natchrawldry Active Member

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    Pie
     
    #6
    Natchrawldry, Nov 15, 2011
  7. The Raging Oxter

    The Raging Oxter Well-Known Member

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    You forgot to carry the one <doh>
     
    #7
    The Raging Oxter, Nov 15, 2011
  8. jenthesaint1990

    jenthesaint1990 Well-Known Member

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    i) m or the gradient = -0.5
     
    #8
    jenthesaint1990, Nov 15, 2011
  9. The Raging Oxter

    The Raging Oxter Well-Known Member

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    Didn't TFWNN teach mathematics at High School?

    This should be a doddle for him.

    Where are you TFWNN?
     
    #9
    The Raging Oxter, Nov 15, 2011
  10. Tina_old

    Tina_old Princess

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    He'll be currently burning or stabbing an effigy of you/me <laugh>
     
    #10
    Tina_old, Nov 15, 2011

  11. irishgreen

    irishgreen Well-Known Member

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    Haven't a ****ing clue.Now **** off <ok>
     
    #11
    irishgreen, Nov 15, 2011
  12. thefanwithnoname

    thefanwithnoname Well-Known Member

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    I think you will find the answer is

    For right angled triangle the center of the circle is the midpoint of DF (Thales theorem) the radius is the distance between this midpoint and E (where is the right angle)
     
    #12
    thefanwithnoname, Nov 15, 2011
  13. thefanwithnoname

    thefanwithnoname Well-Known Member

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    only effigy that gets burnt is of someone important

    unfortunately your profile does not fit <ok>
     
    #13
    thefanwithnoname, Nov 15, 2011
  14. Tina_old

    Tina_old Princess

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    God bless Google <laugh>
     
    #14
    Tina_old, Nov 15, 2011
  15. The Raging Oxter

    The Raging Oxter Well-Known Member

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    #15
    The Raging Oxter, Nov 15, 2011
  16. Tina_old

    Tina_old Princess

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    #16
    Tina_old, Nov 15, 2011
  17. - jordan -

    - jordan - Active Member

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    st and tina not606's very own fred and rosemary west ladies n gentlemen.
     
    #17
    - jordan -, Nov 15, 2011
  18. Hash.

    Hash. pure daycent

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    sorry
     
    #18
    Hash., Nov 15, 2011
  19. thefanwithnoname

    thefanwithnoname Well-Known Member

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    except the wests were 2 people
     
    #19
    thefanwithnoname, Nov 15, 2011
  20. Tina_old

    Tina_old Princess

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    Shut it, fatso.
     
    #20
    Tina_old, Nov 15, 2011
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