????????????? "measures at the interior angels" ????????????
???? yu meen how big the inside angels ????
?????? "dekagon" ??????
mi ges is thats a 10-gon=10 sides
????????? yu want a REGULAR shape,...all angels the same ????????
senter angel=360/n=360/10=36 deg
outside angel=senter angel=36 deg
inside angel=180-outside=180-36 =144 deg