Kuroko's Basketball is my favorite anime.

I heard the sound of a steam whistle from afar.

He spilled a drop of coffee on the table.

A positive-definite matrix is an important concept in linear algebra.

There are times when we perform calculations with the haversine in trigonometry.

He drew an equilateral triangle shape.

He made a model of a regular tetrahedron.

This orthophoto shows the details of the terrain very clearly.

I decided to celebrate her birthday.

My house is in the north of Japan.