PREVIEW

... swer:

Assuming that the radius of the small circle is r, and the circumference as ?.

= 2πr

The question asks for the area between radius 1 and 3, so we’ll call it ‘S’.

Therefore, the answer is 8π.

Teacher's Comment:

Well answered. This is a standard question for area.

Yoshii Akihisa's Answer:

Teacher's Comment:

It's been a while since I felt my veins popping.

Tsuchiya Kouta's Answer:

Te ...

YOU MAY ALSO LIKE
Strongest Nova: Path of VengeanceChapter 48 The Mayor’s Dilemma
 46
5.0/5(votes)
FantasyMysteryActionTragedy

In the town of Last Hope, anyone without an awakened power is treated as less than a person.

At the age of 17, Stanley has lost all hopes of getting any power. However, one day he realizes that he actually has 3 different ones. Although, none of his 3 powers seem to follow the rules that other people's powers abided by.

Has he still not finished awakening his powers, or is this something different? And will this at all help him with getting his revenge against those that were responsible for his mother's death?

Follow Stanley as he uncovers conspiracies, mysteries, and most importantly, the truth about himself in his pursuit of revenge.

……………………………………………………………

Dear readers! Without any ads, maybe you will prefer .

Global ExaminationChapter 166: Autumn
 414
5.0/5(votes)
ActionComedyHorrorMystery

The whole world is subjected to a highly dangerous standardised exam called the Global Examination. Answering questions by putting their lives at stake, they would live if they passed the test. Every month the exam will undergo reformation while, occasionally, it is random.

MTL - The Great Era of Rebirth: 1993Chapter 1015 , Surprised or not? Is it surprising?
 219.7k
2.8/5(votes)
Urban Life

Live again, earn money well, and live life slowly. General group: 841193493

- Description from novelbuddy

MTL - Take Taobao to the Ancient TimesChapter 1142 Finale
 140.2k
3.0/5(votes)
Romance

An Xiaojiu stepped on the soap in the bathroom and fell directly to ancient times!

Crossed, or with Taobao, An Xiaojiu determined to become the ancient Jack Ma!

Just when I first wore it, I met grandma, grandma, and auntie. She either wanted to kill her or sold her!

These are nothing, we have Taobao! The ancient broken bowls can sell a lot of money on Taobao. We also double the eleven in ancient times!

I was thinking of being casual and doing myself well, but I was pregnant while unmarried. Only then did An Xiaojiu know how lowly the status of an ancient merchant girl was!

Low enough, she won’t be recognized by her future mother-in-law for buying one get two!

The secret of identity, whose conspiracy?

Love chase, whose life and death?

Looking back, my affection remains unchanged, can you still hold a sword to protect me?

- Description from Qidian