Question 667215
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,

apothem of a <u>regular triangle </u> is 3, and the base is 4. {{{P = 12}}}
area = (½)(apothem)(perimeter)
area = {{{(1/2)*3*12 = 18}}}