A circle has the order pairs (-1, 2) (0, 1) (-2, -1) what is the equation . Show your work.
1 answer:
We know that:
is an equation of a circle.
When we substitute x and y (from the pairs we have), we'll get a system of equations:
and all we have to do is solve it for a, b and r.
There will be:
From equations (II) and (III) we have:
and from (I) and (II):
Now we can easly calculate a and b:
Finally we calculate
:
And the equation of the circle is:
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D beacuse a hexangon is like the shape of the circle