This solid is called a regular icosahedron, and it is made up of 20 equilateral triangles.

I went to the market accompanied by my mother.

Deuterium is one of the isotopes of hydrogen.

He sat in the cockpit and flew the plane.

My mother prepares a traditional frugal Japanese meal every day.

We live in social housing.

He ran around the park freely.

He is an executive at the company.

My family consists of ten people.

Remembering the fifty-two kana is very important in learning Japanese.