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Question

this is my introduction on my report on geometry in art

Have you ever looked at a piece of art, and wondered what’s it made of? Art isn’t just drawings, but geometry is what creates art. Circles, squares, lines, basically all shapes are used in art. How geometry is used in art, why geometry is used in art, and what makes up art.

please evaluate, and add more if necessary.

Answer 1

I see that you are trying really hard to get those three points, but you are going to have a hard time keeping your thoughts straight. The last point "and what makes up art" really isn't a point at all. Also, it would be helpful to make a statement that is a bit more broad. "Art is Mathematical" would produce a much more interesting paper than "Art is Geometrical". Besides, trying to find three valid points and then proving them would be a bit difficult. Here is an easy formula for writing a thesis statement: (This) is (this) because of (this), (this), and (this).
Example: (this)Art is not just pretty pictures, (this)it is mathematical because (this)it utilizes geometrical shapes, (this)measurements, and (this)even formulas. Next, you will have to prove your points by using sources that demonstrate your statement. You could look at Art known to be very mathematical. Look at Escher, Fractal Art, Architecture for example.
Good Luck

Answer 2

"How geometry is used in art, why geometry is used in art, and what makes up art. "

This is not a sentence, you need a predicate. I can't comment on the content. I know nothing about visual art theory.