Question

The centre of a circle is (-2,-5). The circle passes through (5.-6) then the length of radius is​

Answer 1

Answer:

Let P and Q be the coordinates (-2,-5) and (5,-6)

Distance between P and Q = Radius of the circle

Distance between P and Q

= √(x2 - x1)² + (y2 - y1)²

= √(5- -2)² + (-6- -5)²

= √(5+2)² + (-6+5)²

= √7² + (-1)²

= √49+1

= √50

= 5√2

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