He pasted a poster on the wall.

This wall is completely vertical.

This building maintains perfect verticality.

This plan was perfectly successful.

This project has been completed in its entirety.

After the earthquake, a crack developed in the wall.

He is a perfectionist, and his approach to work is very strict.

This programming language is said to be Turing complete.

His performance was perfect and without blemish.

In mathematics, a perfect number refers to a number where the sum of its divisors, excluding the number itself, equals the number.