Final answer:
Bilateral symmetry involves division through a midsagittal plane, resulting in mirror images on each side. Radial symmetry has body parts arranged around a central axis, with no distinct left or right sides.
Step-by-step explanation:
Bilateral symmetry involves the division of the animal through a midsagittal plane, resulting in two superficially mirror images, right and left halves. Animals with bilateral symmetry have a "head" and "tail", front and back, and right and left sides. On the other hand, animals with radial symmetry have body parts arranged around a central axis, such as a bicycle wheel or pie. They have top and bottom surfaces but no distinct left or right sides.