TS EAMCET · Maths · Circle
The radius of the circle passing through the points \((-1,1),(2,-1)\) and \((1,0)\) is
- A 5
- B \(\frac{\sqrt{130}}{2}\)
- C 6
- D \(\frac{\sqrt{145}}{2}\)
Answer & Solution
Correct Answer
(B) \(\frac{\sqrt{130}}{2}\)
Step-by-step Solution
Detailed explanation
Let coordinates of the centre of the circle \(\mathrm{O}=(\mathrm{x}, \mathrm{y})\) On solving we get \(\mathrm{O}=\left(\frac{-5}{2}, \frac{-9}{2}\right)\) Now \(r=\frac{\sqrt{130}}{2 .}\)
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