USSR
The USSR built the Sputnik.
The USSR built the Sputnik.
the 2 in Sputnik 2 means it is the second to be built.
Russia.
Yes, both were launched from the Baikonur Cosmodrome.
Sputnik-2
The dog, Laika, died due to temperature increase.
Sputnik 2 has been in space for sixty (60) days.
They were unmanned, although Sputnik 2 carried a dog into space.
Sputnik 2 was a solid object which was conical is shape. Solid objects do not have perimeters.
Russia
me