The Prime Meridian (0° longitude) does not pass through Lake Victoria. The lake is located in East Africa, centered approximately at 1°S, 33°E—entirely in the Eastern Hemisphere.
The Prime Meridian runs through:
Lake Victoria—the world's second-largest freshwater lake by surface area (59,947 km²)—is bordered by Tanzania, Uganda, and Kenya. Its longitude ranges from approximately 31°40'E to 34°50'E, placing it over 30 degrees east of the Prime Meridian.
The Equator (0° latitude) does cross Lake Victoria's northern reaches, but the Prime Meridian is far to the west.