Formal:  a straight line about which an object may rotate or that divides an object into symmetrical halves.

Informal: A line that divides a shape in symmetrical half

Formal: lack of equality or equivalence between parts or aspects of something; lack of symmetry.

Informal: Opposite of Symmetry

Formal: A principle of art, unity occurs when all of the elements of a piece combine to make a balanced, harmonious, complete whole. Unity is another of those hard-to-describe art terms but, when it’s present, your eye and brain are pleased to see it.

Informal: Unity is when elements come together in peaceful harmonious way making the composition a unified art piece.

http://dk-consulting.co/unity-in-art

Formal: all of the elements of a piece combine to make a balanced, harmonious, complete whole.

Informal: When the elements of a composition work together is a equal peaceful way

http://mmwdp.weebly.com/digital-arts.html

Formal: Scale and proportion in art are both concerned with size. Scale refers to the size of an object (a whole) in relationship to another object (another whole).

Informal: Is the size of an object that is proportional to another objects

http://forum.xcitefun.net/division-of-space-large-scale-sand-art-t49193.html

It’s amazing, I’ve entered inside the Cooper Hewitt Museum and i saw that people had to pay to go inside I was like HA! while showing my School ID card to the front desk. Being able to get in free is awesome because The Cooper Hewitt is an amazing Museum, the design are amazing, the texture are breathtaking, especially the small designs on the second floor. I recommend people to go with someone who loves Museum, the experience is something that you never forget.

http://study.com/academy/lesson/reification-definition-examples-quiz.html

I created this

http://www.explore-drawing-and-painting.com/design-drawing.html