Mathematics · 2019
JEE Main · 10 April 2019, Shift 1 · Q80
The line x=y touches a circle at the point (1, 1). If the circle also passes through the point (1, -3), then its radius is:
The line $\displaystyle x=y$ touches a circle at the point $\displaystyle (1, 1)$. If the circle also passes through the point $\displaystyle (1, -3)$, then its radius is :
Official answer
(3)
$\displaystyle 2 \sqrt{2}$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.