Need Help

Discussion in 'Green Room' started by Gary Pandher, May 25, 2003.

  1. Gary Pandher

    Gary Pandher Moderator

    i am currently working to solve this problem

    Let points A, B, C, D and E occur in that order on a circle.
    Form a pentagram by drawing the chords AC, CE, EB, BD, and DA.
    There are five "tip triangles" in this figure (for instance, one
    tip triangle has as vertices B and the two points of intersection
    of the chord AC with the chords BD and EB). Prove that the
    pentagram is regular (i.e., the points A, B, C, D and E are the
    vertices of a regular pentagon) if and only if the five tip
    triangles have the same area.

    in a pentagon what do the angles add up to?..
    also if you know of a way to solve this could you share the solution that you have or have come up with please?..thanks for all your help guys
  2. Geffy

    Geffy Moderator Folding Team

    United Kingdom
    I got to about the word chords and my mind left, but it is 4am here
  3. Octopus

    Octopus Moderator

    don't know my conclusion:
    the vertices give you the mid-point
    the angle between AC=the angle btween CE..etc

    if EB=BD then D=E ( divide by B)

    I hate math
  4. Gary Pandher

    Gary Pandher Moderator

    :S im confused bout what i asked and what u answered after reading that lol...
    anone know the formula to get the area of a pentagon?
  5. Khayman

    Khayman I'm sorry Hal... Political User Folding Team