How do you find diameter,radius, and area of a circle if the circumference is 43.96?

1 Answer
Aug 1, 2015

Answer:

Radius: #color(blue)(r=7cm#
Diameter: #color(blue)(d= 14cm#
Area:#approxcolor(blue)(154cm^2#

Explanation:

The formula for the circumference of a circle is :

#color(blue)(2pir)=43.96cm# (assuming the unit to be in cm).

#pi# has a constant value of #3.14#

#color(blue)(2pir)=2*(3.14) *r=43.96cm#

#r=43.96/(6.28)cm#

The radius, #color(blue)(r=7cm#

The diameter = #2 *# (radius)
#=2*7 =color(blue)( 14cm#

The area of a circle is given by formula:
#color(blue)(pir^2)= 3.14*(7)^2 #

The area is #approxcolor(blue)(154cm^2#