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

The ritsuryō system was a system that ruled ancient Japanese society.

His voice felt very warm.

He subjugated this land and built a new kingdom.

He can always maintain his calmness.

The geology of this area is mainly composed of aqueous rocks.

He will become an adult next year.

Next year, my younger brother will have his coming-of-age ceremony.

While rotating on its axis, the Earth orbits around the sun as a satellite.

His results are generally good.