What is one example of modern practical use of Geometry?

Please help immediately I wasn't able to find anything on the internet!

2 answers

rubbish.
How about quilting? carpentry? art?
I have a back yard that measures approximately 70' wide by about 50' deep (away from the back of the house). I want to have new lawn put in the back yard — except for a 5' x 70' strip of ground cover (low plants) and a semicircular flagstone patio that is about 30' across and 12' deep.

What geometric shapes are involved?
How will you figure the area that needs new lawn?