Descriptive geometry meaning architecture

How is geometry used in construction and design?
Geometry is used to design with the best angles to make structures as strong as possible, using shape, size, position and other properties.
Civil engineers use geometry to design and assemble shapes to construct freeways, tunnels, bridges and more..
What is meant by descriptive geometry?
Descriptive geometry is the branch of geometry which allows the representation of three-dimensional objects in two dimensions by using a specific set of procedures.
The resulting techniques are important for engineering, architecture, design and in art..
What is the geometry of architecture?
Architectural geometry is an area of research which combines applied geometry and architecture, which looks at the design, analysis and manufacture processes.
It lies at the core of architectural design and strongly challenges contemporary practice, the so-called architectural practice of the digital age..
Architects use mathematics for several reasons, leaving aside the necessary use of mathematics in the engineering of buildings.
Firstly, they use geometry because it defines the spatial form of a building.
Secondly, they use mathematics to design forms that are considered beautiful or harmonious.

How is geometry used in construction and design?