centre of a circle (-5, 5) which passes through the point (- 1;1) find the radius of the circle
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1
Answer:
centre is(-5,5)
point is(-1,1)
radius is the distance between the centre and the point
that is
√(-5+1)^2 +(5-1)^2
✓16+16
4√2
hope this helps you
Answered by
1
Answer:
Step-by-step explanation: Let the radius of the circle be r, then the equation of circle is
(x + 5)^2 + (y - 5)^2 = r^2
It passes through (-1, 1), so
(-1 + 5)^2 + (1 - 5)^2 = r^2
16 + 16 = r^2
r^2 = 32
r =
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