I live in a solid. I am sitting on a solid and am wearing solids. My eyesight is helped by solids as my fingers tap on different solids and I monitor the results on another solid. That should be enough to get you started.
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I walk on them. I live in them. I eat with them and I am partly made of them.
how are emeralds use in everyday life
Unless your "everyday life" involves work in some area of engineering, you won't use matrices in your everyday life.
Geometry is used in my everyday life because I see it everyday. Everything I see is practically geometry. There are posters on my classroom wall, there are desks and chairs, tables, and a big nice white board. I guess this is really how I used geometry in my everyday life.
You eat it......