Why reptiles are not considered dinosaurs but the birds are?

Question

The reptiles to me look exactly like dinosaurs, their skeleton resemble fossils and they are cold-blooded.

In: 1

Answer 1

Many dinossaurs were warm-blooded.

Also, one of the traits of all reptiles are that they have their limbs in a 90 degree shape, since they stick out of the body to the side, then down. Dinossaurs had their limbs directly down.