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

My room is twenty-four square meters.

I will turn twenty years old next year.

Our project is scheduled to be completed on the twentieth day of the month.

Masatoshi is my best friend.

Masahiro is my best friend.

Masamitsu is my best friend.

Masasho is my best friend.

Mr. Masagaki is my best friend.

Mr. Takeshige is my best friend.