How to calculate the area of a sector?

1, circular area = radius× radius× π. The formula is: s=πr2 (π is pi equals 3. 14, r2 is the square of radius).

2. The sector is a part of a circle, so the formula of sector area = radius× radius× π× degree of central angle ÷360 is: s=n/360πr2.

Summer is coming, and crops grow rapidly at a certain temperature. If the temperature is high, the temperature is not enough, and the solar terms are not up, they will gradually mature.

"Growing up in Summer" is a text compiled by the fifth unit of the first volume of the sixth grade of primary school Chinese. This lesson is an essay about rationality. The author describes the natural phenomenon of the growth of everything in summer with simple, fresh and beautiful language.

At the beginning, the central sentence "Summer is the season of rapid growth of all things" leads to the full text, and at the end, the center is pointed out and the full text is closed. Enlightenment: "People should grasp the time and try to be as long as possible."

Sogou asked.

Extended data:

This paper introduces us how familiar things grow in summer in easy-to-understand language, which makes us realize the importance of adolescence and inspires us to cherish the good times and grow healthily and powerfully. The language of this article is simple and friendly, which is interesting to read and not difficult for students to understand.