??????????? "measuer av angel" ???????? yu meen.. how big ?????
???????? b & d maebee=angels ??????????
if so, weer R em??????????
parallelogram...2 angels on base (left & rite ends) add up tu 180 deg
same for 2 angels at top
In fakt, if go round rim from NE start point, first 2 angels yu meet add up=180 deg