No. I am a primate and my face is not flat. Is yours?
The monkey known for its flat face is the macaque, particularly the Japanese macaque or snow monkey. Their distinct facial features, including a relatively flat nose and expressive faces, make them easily recognizable. Other primates, such as certain species of owl monkeys, also exhibit flat facial structures, but macaques are the most commonly associated with this characteristic.
flat
A Cone
The answer is - a cone.
perabale
If you mean "Are all mammals primates?" then the answer is no. Primates are a type of mammal. All primates are mammals. Not all mammals are primates. For example, cats, dogs, bears, rodents... these are all mammals, but not primates.
All chimpanzees are primates but not all primates are chimpanzees. Humans, for instance, are primates.
It is a definitional requirement. If any face is not flat, then it is not a polyhedron.
all primates have thumbs
Yes. Monkeys are primates
All monkeys are primates.
flat
All primates are mammals.
Yes. All monkeys and apes are primates, and all primates are mammals.
hemisphere
A Cone
The answer is - a cone.