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.
In the 1980s, Welker voiced many recurring characters in the original Transformers animated series. He voiced several Decepticons, including the leader Megatron, Soundwave, Skywarp, Mixmaster, Laserbeak, Buzzsaw, Rumble, Frenzy, Ravage and Ratbat, as well as Autobots Mirage, Trailbreaker and Sludge.