Answer:
Chopin's first étude focuses on a rippling chord progression. The piece is composed in the same ternary (or A-B-A) form as most of his Op. 10 études, introducing two ideas before coming back to repeat the first.
The orthogonal lines in the work merge at the vanishing point. In a perspective drawing, the artist uses parallel diagonal lines which meet and diminish to a vanishing point. These lines are called orthogonal and create the perspective and a more realistic view. The vanishing point offers the painting a three-dimensional look.
