Assertion: regular polygon's angle | /r/HasAspect | a sum of #360^o# #
Facets:
Source sentences:
text: The exterior angle have a sum of #360^o# #=(3)120^o#
text: The exterior angle have a sum of #360^o# #=(4)90^o# .
text: The exterior angle have a sum of #360^o# #=(5)72^o# .