Assertion: parabola's focus | /r/HasProperty | semi-latus rectum
Facets:
Source sentences:
text: Its focus is ( 0 , 1 4 ) {\displaystyle \left(0,{\tfrac {1}{4}}\right)} , the semi-latus rectum p = 1 2 {\displaystyle p={\tfrac {1}{2}}} , and the directrix has the equation y = − 1 4 {\displaystyle y=-{\tfrac {1}{4}}} .