If the circumference of a spherical object is 43.96 cm, what is the surface area of the object? Use 3.14 for pi im doing math with surface area fora sphere

Solutions

Finding the sum of all the areas of each face on a 3-D object is called calculating the surface area. To calculate the surface area you use the formula c=2πr.

Calculate

SA = 4πr²

43.96 = 2 πr

Divide each of the side by 2

43.96 = 2πr : 2

21.98 = πr

divide both sides by π (approximate π to 3.14)

7=r

SA=4πr²

SA=4π7²

SA=4π49

SA=196pi

SA = 615.44 cm²

C=2pir

SA=4pir^2

43.96=2pir

divide both sides by 2

21.98=pir

divide both sides by pi (aprox pi to 3.14)

7=r

SA=4pir^2

SA=4pi7^2

SA=4pi49

SA=196pi

aproxpi=3.14

sa=615.44 cm^2