This site uses flash for videos. If you're having trouble enabling it, click on the information icon in the address bar to change your settings to allow Flash.

Equations of Lines (Altitudes and Orthocentres)

  1. 1
    Given a triangle with vertices A(5,1), B(0,-9) and C(-9,3) find:

    a) The equation of the altitude from A to BC.
    b) The equation of the altitude from C to AB.
    c) The orthocentre of the triangle ABC.
  2. 2
    Given a triangle with vertices A(3,-9), B(-9,0) and C(1,5) find:

    a) The equation of the altitude from A to BC.
    b) The equation of the altitude from C to AB.
    c) The orthocentre of the triangle ABC.
  3. 3
    Given a triangle with vertices A(-4,3), B(6,8) and C(8,-6) find:

    a) The equation of the altitude from A to BC.
    b) The equation of the altitude from C to AB.
    c) The orthocentre of the triangle ABC.

$$e=mc^2$$