2023.11.05
!!! /txt/rela(xa)tion.txt (sin)


enu: Esp thx to Oleh Petrenko Crocodile
     For a parralelogram the angle does really matter and influences its square
     Any triangle is obviously 1/2nd of its parralelogram
     Try on matches...


ukr:       
           
       -  1/2  
       ...


       /.--------.
      / .       /.
     /  h      / .  Sp = a*h = a*sin(?)
    /   .     /  .  St = 0.5*Sp
   /?  .    /   .
  /-----a---/.....


enu: continued, adversely prove theorem of sinuses
ukr: ,      


           B
          /|  .
         ' |    .
        /  '   *  .a
      c/   | *'     .
      /    *      '   .
     /   * |         '  .
    /  *   |            ' .
   / *     |                .           | |
  A-----------b-------------C        \   /


     a       b       c
     - ?=    - ?=    -
  sinA    sinB    sinC


!!! /mul div inductives.txt


   a*sinB = sinA*b = Sp = 2St
