alleryLatus rectum of parabola y² = 4ax:
A4a (chord through focus perpendicular to axis)
B8a
Ca
D2a
Answer & Solution
Correct answer: A. 4a (chord through focus perpendicular to axis)
**Latus rectum:** chord through focus perpendicular to axis.
For y² = 4ax: length = 4a. Endpoints: (a, ±2a).
Used for problems involving focal chord properties.
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