This shape is an antiprism.

He is good at making triangular prisms.

Kōzuke Province was one of the provinces that once existed in Japan.

What is today's date?

He is lining his pockets with that project.

He always has an overly optimistic view.

He is doing special exercises to strengthen the lateral rectus muscle.

An antiprism is a part of geometry, and its shape is very unique.

He made a model of a triangular prism.

You shouldn't tell him secrets because he has a loose tongue.