What is the equation of a circle with center (2,5) and radius 4?
Mathematics
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Question
What is the equation of a circle with center (2,5) and radius 4?
2 Answer

1. User Answers altavistard
Answer:
(x  2)² + (y + k)² = 4²
Stepbystep explanation:
To answer this, we insert the given into (center xcoordinate 2, center ycoordinate 5, radius 4) into the general formula for a circle with center at (h, k) and radius r: (x  h)² + (y  k)² = r² → (x  2)² + (y + k)² = 4²

2. User Answers AL2006
The GENERAL equation for EVERY circle with its center at (A, B) and a radius of R is
(x  A)² + (y  B)² = R² .
So if you just stuff in the numbers given in this question, the equation of THIS circle is
(x  2)² + (y + 5)² = 16