Question 1185239
A square whose area is 81 has its perimeter

equal to the perimeter of an equilateral
triangle. What is the area of the triangle?
<pre>With {{{a^2+6^2=12^2}}}, {{{2(1/2)12*a}}} or {{{highlight_green(12a)}}} <font color = red><font size = 4><b> WILL NOT</font></font> get you the equilateral triangle's correct area, as the other person claims.</b>
Correct area: {{{highlight_green(matrix(1,3, 36sqrt(3), squared, units))}}}