He made a lamp in the shape of a hexagonal prism.

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

Our new project will start on the third day of the month.

He ate three apples.

My friend has twin brothers.

He is using binoculars to observe birds.

This beautiful twin crystal is one of the wonders of nature.

His swordsmanship can be called true unparalleled.

This is part of my collection, and I particularly like the dipyramid.

This two-way communication system can send and receive data.