SOLUTION: how to find the latus rectum in parabola

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Question 1046535: how to find the latus rectum in parabola
Answer by MathLover1(20850) About Me  (Show Source):
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The latus rectum runs parallel to the directrix and passes through the focus. Its length:
In a parabola, is four times the focal length or 4p.

p+= distance between the vertex and focus
Then
2p = distance between directrix and focus
2L = latus rectum
2L+=+4p