Centre-radius form of a circle
Two-dimensional geometry · Mathematics
Study notes
Q: Find centre and radius of x² + y² − 2x + 6y + 6 = 0 by completing the square. (x²−2x+1) + (y²+6y+9) = −6+1+9 (x−1)² + (y+3)² = 4. Centre (1,−3), radius 2.
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Two-dimensional geometry · Mathematics
Q: Find centre and radius of x² + y² − 2x + 6y + 6 = 0 by completing the square. (x²−2x+1) + (y²+6y+9) = −6+1+9 (x−1)² + (y+3)² = 4. Centre (1,−3), radius 2.