Final answer:
Spherical geometry was invented by Greek astronomers.
Step-by-step explanation:
The invention of spherical geometry can be attributed to Greek astronomers.
As early as 2500 years ago, Greek philosopher and mathematician Pythagoras proposed that Earth is a sphere because circles and spheres are considered 'perfect forms.'
The Greeks also cited the fact that the Moon is a sphere as evidence. While Muslim and Babylonian astronomers made significant contributions to astronomy, the invention of spherical geometry is credited to the Greeks.