Question 854299
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
<img src='http://img210.imageshack.us/img210/7630/pyramid.png' border='0'/></a>
surface area = base area + 4(area of triangular faces)
             = {{{12cm*12cm + 4((1/2)12cm*11.2cm))}}}