Question 759088
<font face="Times New Roman" size="+2">


The area of a square is given by *[tex \LARGE A\ =\ s^2] where *[tex \LARGE s] is the measure of one of the sides.


So, *[tex \LARGE s^2\ = 20]


Take the square root of both sides:  *[tex \LARGE s\ =\ \sqrt{20}\ =\ \sqrt{4*5}\ =\ 2\sqrt{5}].


The perimeter is 4 times the measure of one side, so *[tex \LARGE 4\ *\ 2\sqrt{5}\ =\ 8\sqrt{5}] to be exact or approximately 18 rounded to the nearest centimeter. You cannot round to greater precision than the nearest centimeter because your given measurement, the area of the square, was given to the nearest square centimeter and you cannot have greater precision in your answer than the least precise given measurement.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
<font face="Math1" size="+2">Egw to Beta kai to Sigma</font>
My calculator said it, I believe it, that settles it
<div style="text-align:center"><a href="http://outcampaign.org/" target="_blank"><img src="http://cdn.cloudfiles.mosso.com/c116811/scarlet_A.png" border="0" alt="The Out Campaign: Scarlet Letter of Atheism" width="143" height="122" /></a></div>
</font>