Descriptive geometry architecture definition

How does geometry relate to architecture?
Before construction workers can build a habitable structure, an architect has to design it.
Geometry, algebra, and trigonometry all play a crucial role in architectural design.
Architects apply these math forms to plan their blueprints or initial sketch designs..
Semicircles, elliptic, parabolic, etc.
There are many geometric shapes used for the creation of arches and curves and with which horseshoe shapes, lobed, arches, etc. are achieved.
The polyhedrons most commonly used in architecture are cubes and octahedrons.

How does geometry relate to architecture?