Surface area of a cubeTo derive the formula of the surface area of a cube, do the followings:
In order to make a cube like the one shown above, you basically use the following cube template: Looking at the cube template, it is easy to see that the cube has six sides and each side is a square The area of one square is a × a = a^{2} Since there are six sides, the total surface area, call it SA is: SA = a^{2} + a^{2} + a^{2} + a^{2} + a^{2} + a^{2} SA = 6 × a^{2} Example #1: Find the surface area if the length of one side is 3 cm Surface area = 6 × a^{2} Surface area = 6 × 3^{2} Surface area = 6 × 3 × 3 Surface area = 54 cm^{2} Example #2: Find the surface area if the length of one side is 5 cm Surface area = 6 × a^{2} Surface area = 6 × 5^{2} Surface area = 6 × 5 × 5 Surface area = 150 cm^{2} Example #3: Find the surface area if the length of one side is 1/2 cm Surface area = 6 × a^{2} Surface area = 6 × (1/2)^{2} Surface area = 6 × 1/2 × 1/2 Surface area = 6 × 1/4 Surface area = 6/4 cm^{2} Surface area = 3/2 cm^{2} Surface area = 1.5 cm^{2} 




Are you a fan of this site? Support us Our awards! Our partners About me Disclaimer Build your website! Advertise on my site Try our free toolbar Like us on Facebook Take our survey 

