credit to khan academy unit 1 of AP art history lesson 4 principles of composition
Balance
Balance is an even use of elements throughout a work of art
Symmetry
. Symmetry is a very formal type of balance consisting of a mirroring of portions of an image.
Bi-lateral symmetry
Bilateral symmetry, that is, two- sided symmetry, is the most common, in which two halves of a work of art mirror each other, as in Perugino’s painting, Christ Giving the Keys of the Kingdom to St. Peter. In this painting, the symmetry gives the painting not only a sense of balance, but also a sense of calm, stability, and formality. Notice in particular the way that the building and arches in the background are painted to make the work symmetrical.
Radial Symmetry
Radial symmetry is created when an image is symmetrical around a central point or axis, like a sunflower viewed head-on. Radial symmetry creates a strong sense of unity in a work of art, and is common in sacred images.
Asymmetrical Balance
However, perfect symmetry is not necessary to create a sense of balance in an image. Asymmetrical balance is created when two sides of an image do not mirror each other, but still have approximately the same visual weight, the same amount of detail or shapes or color, and so on. The Classical Greek sculpture Doryphoros (The Spearbearer) by Polykleitos provides a clear example of asymmetrical balance. The figure does not stand in a symmetrical way, but overall, seems even, calm, balanced. In this case, the figure has his weight on his right leg, so this leg is tensed. The left leg is relaxed and bent. Balancing this out, the right arm hangs loosely, but the left arm is tensed. In this way, the body — which itself is symmetrical, or would be if he were posed with his feet side by side, looking straight ahead, with his arms hanging down — is balanced. This pose is called contrapposto, and is often used to give standing human figures a sense of life and animation.
Emphasis
Emphasis consists of drawing attention to one or more points in a work. This can be accomplished through any of the visual elements. In the World Womb Mandala, the Buddha is emphasized through location (he is centered in the image), color (the vivid red petals around him draw the eye), line (all of the rows of figures essentially guide the eye inward to the center through implied lines, and the lines dividing the red petals direct us inward, as well), symmetry (the radial symmetry focuses us inward to the center), and so on. In essence, we cannot help but return, again and again, to the Buddha, the focus of the image and also the focus of Buddhist devotion.