Please teach me how to calculate the circumcenter of this triangle.

Sotonami is my best friend.

Working outside the pit is dangerous.

Seigai is my best friend.

Mr. Sotozono is my best friend.

Insects have an exoskeleton, which protects their body.

This medicine is made outside of the body.

We should always remember the power of Kannon in difficult times.

This sentence contains non-Jōyō kanji.

This sentence contains kanji not approved for regular use.