This regular tetrahedron is composed of equilateral triangles on all sides.

He crossed many mountains and rivers to meet her.

I consigned my dog to him.

He is a perfectionist, so he is very strict about his work.

He publicly acknowledged that he is a homosexual.

He always looks at things like a pessimist.

He is always an optimist, believing in a bright future even in difficult situations.

He identifies himself as an atheist.

He is the intellectual leader of our team, always providing new ideas.

He is a true humanitarian, always striving to alleviate the suffering of others.