What is the equation of a circle with a center of (-2, -1) and radius of √2?
2 answers:
Answer:
(x + 2)² + (y + 1)² = 2
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius.
Here (h, k) = (- 2, - 1) and r = , thus
(x - (- 2))² + (y - (- 1))² = ( )², that is
(x + 2)² + (y + 1)² = 2 ← equation of circle
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