Question

How did powerful family such as the Medici and the sforza help spread renaissance ideas?

Answer 1

They commissioned and funded art  and their work

Answer 2

Answer:

By patronizing.

Explanation:

The patronage is when wealthy people sponsor financially, in this case, artists to promote their work, this is what the Medici and the Sforza families helped the art in the Renaissance. This way the artists didn't have to worry about making money but to improve their art, that contributed to the quality of art we can find in history.