Fernando
The rope is longer than the distance between the pegs x and y.
(I hope the characters / and \ work as forward and backward oblique on your
screen and you will need to look at this in a fixed width font I expect.)
Pick a point * which I shall draw nearer the end x and move so that the rope
is taut from * to x and also from * to y
*_
/ -_
/ -_
x y
Here * is shown above the line x - y
Move to the other side of the line keeping hold of * with it taut again
Now you have
x y
\ _-
\ _-
*-
and connect the two points where you held * taut
*_
/I -_
/ I -_
x I y
\ I _-
\I _-
*-
like a kite shape
You see that the line I I I I between the * and * is at right angles to the
line x------y
Regards
Andrew James
