This figure is an acute triangle.

He is learning karate for self-defence.

He works at a public enterprise.

We live in social housing.

This shop is currently open.

Please stand in the center position.

He received an honorable award.

Tridymite, in mineralogy, is a type of silica and is often found in volcanic rocks.

In chemistry, we use projections to represent the shape of molecules.

He works as a Japanese-English interpreter.