» 정다각형의 면적


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$$A= n\times \frac{ar}{2} $$



또는 :


2차원 도형


    Fatal error: Uncaught TypeError: asort(): Argument #1 ($array) must be of type array, null given in /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/resources/area_seealso.php:37 Stack trace: #0 /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/resources/area_seealso.php(37): asort(NULL) #1 /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/templates/form_area.php(92): include('/data01/virt105...') #2 /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/templates/form_area_regular_polygon.php(1): include('/data01/virt105...') #3 /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/templates/body.php(200): include('/data01/virt105...') #4 /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/index.php(52): require_once('/data01/virt105...') #5 {main} thrown in /data01/virt105116/domeenid/www.calkoo.com/htdocs/calkoo/resources/area_seealso.php on line 37