@options;

@figure;
  A = point( -9 , -6.87 )  { i };
  B = point( 2.13 , 2.4 )  { i };
  d1 = droite( A , B );
  C = point( -7.17 , 3.17 );
  d2 = perpendiculaire( C , d1 )  { rouge };
  D = point( -2.8 , 5.37 );
  E = point( 4.5 , -3.16 );
  d3 = droite( D , E ) { vertfonce };