Surface area of spheres practice answes
Sure, I can provide you with some practice answers for calculating the surface area of spheres.
1. Find the surface area of a sphere with a radius of 5 centimeters.
Solution: The formula to calculate the surface area of a sphere is A = 4πr^2, where r is the radius.
A = 4π(5)^2
A = 4π(25)
A = 100π cm^2
2. Determine the surface area of a sphere with a diameter of 12 inches.
Solution: The radius of the sphere can be determined by dividing the diameter by 2. Thus, the radius is 6 inches.
A = 4π(6)^2
A = 4π(36)
A = 144π in^2
3. Calculate the surface area of a sphere with radius 2.5 meters.
Solution:
A = 4π(2.5)^2
A = 4π(6.25)
A = 25π m^2
4. Find the surface area of a sphere with a diameter of 8 centimeters.
Solution: The radius of the sphere is half the diameter, so the radius is 4 centimeters.
A = 4π(4)^2
A = 4π(16)
A = 64π cm^2
5. Determine the surface area of a sphere with a radius of 3 meters.
Solution:
A = 4π(3)^2
A = 4π(9)
A = 36π m^2
Please note that the answers provided above are rounded to the nearest hundredth place and include the unit of measurement, such as cm^2 or m^2.