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

He always lives without forgetting his child's naive mind.

It's difficult to understand his inner thoughts.

Shinjiro is my best friend.

No one knows his inner thoughts.

I was very moved by his sincerity.

I like drawing pictures with this charcoal paper.

This painting expresses the reality he saw.

We are working hard to implement the new system.

The children were playing tag in the park.