A more thorough explanation:

Definition: A corollary is a statement that can be deduced from a proven statement without requiring much additional proof. It is something that naturally follows from the original statement. Example: If we know that all mammals have hair, a corollary would be that a dog, which is a mammal, has hair. This statement does not require any additional proof because it is already established that all mammals have hair. Another example could be that if we know that all right angles are congruent, a corollary would be that if two angles are congruent, and one of them is a right angle, then the other angle is also a right angle. This statement follows naturally from the original statement and does not require much additional proof. Explanation: The examples illustrate the definition of corollary because they both show how a statement can be deduced from a proven statement without requiring much additional proof. In both cases, the corollary follows naturally from the original statement and does not require any additional evidence or explanation.