Assertion: rectangle's angle | /r/HasAspect | a sum of 180°
Facets:
value: because 360-180=180
type: OTHER
Source sentences:
text: We know that the two right angles given to us have a sum of 180°.
text: Because the interior angles of a quadrilateral is 360°, we know that the remaining two angles must have a sum of 180° (because 360-180=180).