Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

Riemannian geometry is a field of mathematics that studies geometric objects such as curves and surfaces.

He found the target and shot the arrow.

Personally, I think this movie is the best.

He is good at solving geometry problems.

Don't take his joke seriously.

His words had a great influence.

That decision had a bad effect on our project.

He is interested in ichthyological research.

Abstract nouns, unlike nouns that refer to concrete things, refer to concepts or states that do not have a specific shape or color.