NyAsIaTaYlOr NyAsIaTaYlOr

02-05-2017
Mathematics

contestada

ind the area of a circle whose circumference is 31.4 centimeters. Approximate Π as 3.14.

Respuesta :

elijahuang elijahuang

02-05-2017

31.4/3.14=10
10/2=5
5*5*3.14= 78.5 cm square

Answer Link

corajune99 corajune99

02-05-2017

The circumference of a circle is found by 2(pi)•r. To find r, set this equal to the circumference they gave you.

31.4=2pi•r

Divide by 2pi

r=4.997

The area of a circle is given by pi•r^2

A=pi(4.997)^2

A=78.460 cm^2

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