Leotard: a tight-fitting one-piece garment that covers the torso and is worn especially by dancers and gymnasts.
Hmm.. well I don't exactly know what an "l" is. I know that it is like, a subway train-thingy in Chicago... if you're talking about a leotard, then yes; ballet dancers do wear leotards.
Longjohns
Leather, shoe Laces, etc...
The law of conservation of angular momentum is obeyed when a ballet dancer extends her hand outward to slow down. By extending her hand, she increases her moment of inertia, which reduces her angular velocity, allowing her to slow down while conserving angular momentum.
Law suits
There is no continent that begins with the letter L.
Large is a synonym for big. It begins with the letter l.
iT BEGINS wItH l BuT i DONT REALLY know WHaT iT is rEaLlY cAlLeD tHaNkS Are you talking about a hip alignment belt? These are thin belts, usually a different color than the leotard (so that it stands out), that help a dancer see if her hips are square. The belt would be tilted if the hips were tilted. This can solve many problems in pirrouettes, extensions, etc.
Lion, lemur, leopard, lynx in a cave, cage or zoo that starts with L
Landmine is a weapon. It begins with the letter l.
Lap is a word that begins with the letter L and rhymes with cap.
Wait, what the H**l do you mean? "Who was the first TO DANCE ballet?" or "WHAT was the first ballet?" The first ballet (at least ever recorded) was "Le Ballet Comique de la Reine." And as for the first ever to dance... well, that hasn't been put on record either. Sorry...