[size=150] Source: [url=https://www.openmiddle.com/]Open Middle website[/url][/size]
[b]Math Teachers:[/b][br][br]For a version of this problem [i][b]where you can choose your own fixed perimeter[/b][/i], [url=https://www.geogebra.org/m/yh5dpkxr]click here[/url].