Define symmetry and proportion. why are they important to artistic design?

Whenever you design something, it is important to include equality and quantity to the design if you want it to look right. Imagine designing a building; you must proportion the design correctly and be sure that the symmetry is correct or the building may appear lop-sided, out of shape, or could potentially tear down over a period of time. The same applies to art.

Answer squarcialupi codex;

Because they admired it maybe