He was drawing an enneagon shape.

He drew a dodecagon shape.

He drew an octadecagon shape.

He was drawing an icosagon shape.

The Schwarzschild radius is an important concept for understanding the characteristics of black holes.

I bought a new measuring spoon.

I wonder where my medical thermometer is?

He is a herbivore man, not interested in marriage or dating.

This new car is characterized by its streamlined design.

He learned the movements of the solar system using an orrery.