Please teach me how to calculate the area of this circular sector.

We are planning to set off early tomorrow morning.

He has a strong sense of self-affirmation and always maintains a positive attitude.

My room is on the second floor, and your room is above mine.

There is not a single cloud in the sky.

Karen bought a rose at a flower shop.

Rin received a gift from him.

He tampered with my plan.

Mr. Akuzawa drives a car roughly.

Plants of this kind are collectively referred to as 'cacti'.