We landed on the land.

It's difficult to calculate the area of this hexagon.

I plan to travel to Eastern Europe next year.

He observed the stars using a sextant for navigation.

He entered the room.

There are 10 books in my room.

He slipped out of the meeting quietly.

The dentist extracted my decayed tooth.

Do you know at what temperature water boils?

I was amazed at his new idea.