Question

For a parabola whose focus is $(1,1)$ and whose vertex is $(2,1)$, the latus rectum is

• A. $\sqrt{5}$
• B. $2\sqrt{5}$
• C. $4$
• D. $4\sqrt{5}$

Answer 1

Answer: (C)

$4$

The length of latus rectum$\left(l\right)=4\times SC$
where S is the focus and C is the vertex
Therefore, $l=4$