Question 1186876: Find the equation of the circle that passes through (-2, 1), (4, -3), and (4.7)
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Find the equation of the circle that passes through A(-2,1), B(4,-3), and C(4,7)
----------------------
Find the perpendicular bisectors of AB and of BC.
The intersection is the center.
The distance from the center to any of the points is the radius.
=====================
Here's another way.
| x y x^2+y^2 1|
|-2 1 5 1|
| 4 -3 25 1| = 0
| 4 7 65 1|
You can make an Excel sheet to solve it.
|
|
|
