In geometry, the circumcircle of a triangle is the circle passing through the three vertices of the triangle.

In geometry, an incircle is a circle that is tangent to all three sides of a triangle.

The excircle of a triangle is the circumcircle of the triangle.

Round mother, squared baby is a way to express the image of the mother's protection and care for the child.

I need to replace the lens of my glasses.

The villagers used a snare to catch fish.

He puts the book in the bag.

He swayed something in his hand.

The trees swayed under the strong wind.

He looked at her with teary eyes.