Answer:
To create realistic artworks.
Explanation:
How realistic? The difference between the Renaissance art style and its predecessors is the use of perspective. A perspective is created using three or more points, and parallel lines that converge in a vanishing point. This idea is only possible with the use of mathematics because the perspective tends to distort and reduce the size of distant elements, and if you don't use mathematical formulas to correct this point, your painting will be flat. So, the use of angles, shadows, and realistic light, inside the perspective technique, had to be precisely calculated.
