Assertion: ellipse's center | /r/AtLocation | the point
Facets:
Source sentences:
text: When the center of the ellipse is at the point (h,k): where
text: The center of the ellipse is at the points (4,-1)
text: When the center of the ellipse is at the point (h,k): where a is the horizontal semi-axis and b the vertical semi-axis, (h,k)