Question 1157563
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Surface area of the cube consists of 6 squares.


If "a" is the edge length of the cube, then one such face has the area of {{{a^2}}},


and the entire surface area of the cube is  {{{6a^2}}}.


It is the <U>ANSWER</U>  to your question.


Each school class studies it.
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See this group of lessons on surface area of the major solids

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Surface-area/LESSONS-on-Surface-Area-of-3D-SOLID-BODIES.lesson>Surface area of 3D solid bodies</A>

in this site.


Also, in this site you have this free of charge online textbook on Geometry

&nbsp;&nbsp;&nbsp;&nbsp;<A HREF=https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson>GEOMETRY - YOUR ONLINE TEXTBOOK</A>.


On the surface area of a cone and other 3D solid bodies see the lessons in this online textbook under the topic 

&nbsp;&nbsp;&nbsp;&nbsp;<A HREF=https://www.algebra.com/algebra/homework/Surface-area/LESSONS-on-Surface-Area-of-3D-SOLID-BODIES.lesson>Surface area of 3D solid bodies</U>".