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

I got a blister on my foot.

He gulped down the water, perhaps because he was nervous.

He is an expert in topology.

He is an expert in algebraic geometry.

He drew a circle using geometric construction.

In organic chemistry, understanding geometric isomers is important.

He was feigning ignorance after causing the problem.

I am learning the basic concepts of differential geometry.

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