He sleeps eight hours every day.

The tesseract represents a four-dimensional geometric shape.

This pool requires about 50 cubic meters of water.

This bottle can hold 500 cubic centimeters of liquid.

My grandfather is eighty-eight years old.

Mr. Hachijuhachi is my best friend.

This regular dodecahedron is a geometric shape with perfect symmetry.

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

He understands the importance of learning.

He is majoring in psychology.