Determine the radius — task. Mathematics State Board, Class 9.

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Answer variants:

$12$

$9$

$10$

$8$

Verify that

$(-8, -6)$ is the centre of the circle passing through the point

$A(-18, -14)$ ,

$B(-14, 2)$ and

$C(2,-6)$ . Calculate the radius.

The radius of the circle

.

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