How long is the perimeter of this rectangle?

He is obsessed with his own thoughts and refuses to listen to others' opinions.

He is sticking to his own thoughts.

The autumn wind blows, and the leaves fall.

His behavior is considered ugly.

The ugliness of his heart became apparent.

He was respected as the tribal chief of the tribe.

Please adjust the frequency of this radio.

The monk offered prayers every day at the temple.

They fortified the fortress in preparation for the enemy's invasion.