Composition

This first picture of a weight in the gym is an example of radial symmetry. The eye is immediately drawn to the hole in the center of the weight, which is the focal point of the picture (even though the picture is the slightest bit off balance). The other details of this photo radiate from that central point.

This next picture (or at least the focal point of it, the ring) demonstrates bilateral symmetry. If we were to split the ring exactly in half, both sides would look be identical. Many pieces of jewelry and clothing are symmetrical because we naturally find symmetrical things pleasing and attractive. 

I tried to create asymmetrical balance in this photo by placing two knives of completely different lengths next to each other and then taking the photo while positioned off to the left. While it's clear the yellow knife is shorter than the green one since we can see the end of its handle, it almost seems like the tips of the knives end at the same spot because of the angle the photo was taken at.