How sharp is t rexs teeth?

Answer 1

That really depends on what dinosaur, or rather what type of dinosaur, you're referring to: are you asking about the carnivorous reptiles like Tyrannosaurus rex, or the herbivorous dinosaurs like Brontosaurus and Stegosaurus?

Answer 2

They had large calws, sharp enough to rip through a car door.

Answer 3

Triceratops did not have actual claws. Rather, they had small "hooves" on some of their toes, and they weren't sharp.