Assertion: ellipse's distance | /r/HasProperty | a \displaystyle 2a
Facets:
Source sentences:
text: Let L {\displaystyle L} be the point on the line P F 2 ¯ {\displaystyle {\overline {PF_{2}}}} with the distance 2 a {\displaystyle 2a} to the focus F 2 {\displaystyle F_{2}} , a {\displaystyle a} is the semi-major axis of the ellipse.