"Anonymous. 45 degrees is the amount mentioned."
Yes, but if 45 degress is or isn't the PROPER amount depends entirely on the situation, which WAS NOT MENTIONED.
Of course you won't understand that, because you worship heroes and details, while having not a clue as to the substance of what you are talking about.
"Heres another you wont be able to do."
Says who?
"The farther it goes the lower to the floor it gets ,untill the tip of the toe touches the floor. The only way you could get any further extension is to lean forward and we don't do that. This is about where you should be on the count of three (and)."
No, absolutely wrong. You must never try to position the free foot like that with the body weight still stationary over the standing foot.
It is the body, not the feet, which dance.
"Don't forget . To the tip of the toe."
Don't forget, ONLY if you body has moved far enough to justify that. Otherwise going to the tip of the toe is a fatal error.
"The person going back extends . The person in front doesn't. On one the person in front moves his leg forward leaving the tip of the rear toe on the floor. Do you notice there are no legs to push or clash.At this point we have two beautiful leg lines one in front the other behind."
Yes, that it a worthwhile point. But it is a static exercise, and NOT DANCING which you have described. Real dancing will include this to some degree, but only when there is substantial body movement.
The feet do not dance, the bodies do.