How to determine the radius of an element in Photoshop?

Question

HTML

Prior to that, determined by eye. But still it is interesting how who determines the radius of an element?
PS I did not find a sensible answer.

Answer 1

Нажимаешь на элемент со скругленными углами и жмешь на вкладку "Properties"
Снизу будут параметры для каждого угла