OK, interested, here are the details.
The foot rise in a Waltz must be precisely 37.5% at its height for your supporting foot.
You'll need to freeze your motion on the third step of the Waltz while your coach measures the angle with a protractor. If the angle is any higher or lower then you are a hopeless dancer and should take up step aerobics instead.
For the more blockheaded users of this forum, that advice is sarcasm.
Do yourself a favor and pay attention to anymouse. Polished has nothing but contempt for beginners and believes that you should be dancing at Marcus Hilton's level in your first lesson.
Your posts make it appear that you're only taking up dancing as a geometry assignment.
If you're honestly interested in learning to dance then go to the Learning the Dances pages on this website and watch Jonathan and Melissa perform both the basic Waltz and Fox Trot figures.
jj