Assertion: ellipse's foci | /r/HasProperty | ± 5
Facets:
Source sentences:
text: The foci are ( ± 5 , 0 ) , ( ± 5 , 0 ) , so c = 5 c = 5 and c 2 = 25.
text: The foci are ( ± 5 , 0 ) , so c = 5 and c 2 = 25.