This shape is called a bicone.

This bicone shape is mathematically very interesting.

It is said that far infrared radiation has a good effect on the human body.

I needed to calculate the factorial of 5 for a math problem.

My room is on the second floor.

He is good at playing the chromatic scale on the piano.

This staircase is very beautiful.

What floor is the library on?

My room is upstairs.

My apartment is a five-story building.