an = a+(n-1)d Where an=last term a=first term d=common difference n=number of term Note: last term is denoted by an or l Sn=n/2[2a+(n-1)d Sn=sum of all terms
#As shown in the above diagram The cube has 6 square surfaces.they are equal in area. # The cube has 12 equal edges or sides TOTAL SURFACE AREA OF CUBE:- If edge(side) of the cube = a Then,Total...