In mathematical induction, showing that something works for the first case, or that P1 is true. angle of depression. The angle formed by a horizontal line and an observer's line of sight to an object below. angle of elevation. The angle formed by a horizontal line and an observer's line of sight to an object above.
Plankton's voice is provided by American actor Mr. Lawrence. The voice Lawrence uses for Plankton originated as an imitation of one of his deep-voiced friends from high school. On television, he first used the voice for incidental characters on Rocko's Modern Life.
The film stars the series' main cast members, Tom Kenny as SpongeBob SquarePants, Bill Fagerbakke as Patrick Star, Rodger Bumpass as Squidward Tentacles, Clancy Brown as Mr. Krabs, Carolyn Lawrence as Sandy Cheeks and Mr. Lawrence as Plankton.