ko

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

인기 있는 Word Problems >

The area of a circle is 81pi mm^2. What’s its 원둘레?

해법

T h e a re a o f a c i rc l e i s 81 π m m^{2} . Wha t ’ s i t s c i rc u m f ere n ce ?

해법

c i rc u m f ere n ce : 18 π mm

+1

소수

56.54866 \dots

솔루션 단계

Given:

a re a : 81 π m m^{2}

주어진 원 반지름

A re a = 81 π : r = 9

주어진 원 둘레

r = 9 : C = 18 π

c i rc u m f ere n ce : 18 π mm

인기 있는 예

find the conditional probability, in a single roll of two fair 6-sided dice, that the sum is greater than 9, given that neither die is a six The area of a circle is 81𝜋 square feet. What is the 원둘레?The area of a 원형 is 0.0314 square miles. What is the 원형's radius The 원둘레 of a circle is 8𝜋 kilometers. What is the area?A 원형 has a radius of 10.5 centimeters. What is the area of the 원형? Use 3.14 for pi