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Maths P2 Q1(a)

  • 19-06-2006 12:04pm
    #1
    davidgreen
    Closed Accounts Posts: 9 ✭


    Hey guys, ive been tryin2make this question work out. But i continue to get stuck on the same place.(a) a(-1,-3)and b(3,1)are the end points of a diameter of a circle. Write down the equation of the circle.

    -What i did was I calculated the midpoint of the two points and got (1,-1)
    -Then calculated the distance from this point ot one of the end points...but i keep get'n the square root of 8 for my radius..
    -this just wont work for solving the equation of te circle.

    please any1....


Comments

  • #2
    whassupp2
    Closed Accounts Posts: 1,031 ✭✭✭whassupp2


    thats right. radius is root8

    answer is (x-1)/\2 + (y+1)/\2 = 8


  • #3
    davidgreen
    Closed Accounts Posts: 9 ✭davidgreen


    i checked the answer on leaving cert ie and they got the equation of the circle to be (x-1)squared + (y+1)squared = 32


  • #4
    whassupp2
    Closed Accounts Posts: 1,031 ✭✭✭whassupp2


    ya well i gor =8 anyway. must be right coz i dont see any other way of doing it.


  • #5
    davidgreen
    Closed Accounts Posts: 9 ✭davidgreen


    ya i cant see any other way to be honest...we must be right
    thnks


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