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STALIN [3.7K]
3 years ago
9

Find the radius and diameter of circle A, if the endpoints of the radius are (-2, -1) and (6,4).

Mathematics
1 answer:
AleksandrR [38]3 years ago
8 0

Step-by-step explanation:

length \: between \: ( - 2, - 1) \: and \: (6,4) \\  =  \sqrt{(x _{1} - x  _{2} )² + (y _{1}  - y _{2})²  }  \\  =  \sqrt{( -  2 - 6)²+ ( - 1 - 4)²}  \\  =   \sqrt{64 + 25}  \\  =  \sqrt{100}  \\  = 10 \: units \\ radius = 10 \: units \\ diameter = 2 \times radius \\ d = 2 \times 10 \\ d = 20 \: units

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