Final answer:
Renaissance architects like Brunelleschi used past styles by incorporating classical elements and drawing inspiration from Roman architecture. They emphasized symmetry, proportion, and regularity of parts.
Step-by-step explanation:
The Renaissance architects, including Brunelleschi, incorporated past styles in their designs by drawing inspiration from classical Roman architecture and using classical elements such as columns, pilasters, lintels, semicircular arches, and hemispherical domes.
They emphasized symmetry, proportion, geometry, and regularity of parts.
For example, Brunelleschi's dome on the Florence Cathedral combined Gothic technology with Roman influences and became a prominent feature of Renaissance architecture.