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Arada [10]
2 years ago
15

I need help getting how do i do this??

Mathematics
2 answers:
Dovator [93]2 years ago
8 0

Answer:

5 units

Step-by-step explanation:

By distance formula:

r =  \sqrt{(4 - 1) ^{2}  +  {(7 - 3)}^{2} }  \\  \\ r =  \sqrt{ {3}^{2} +  {4}^{2}  } \\   \\ r =  \sqrt{9 + 16}  \\  \\ r =  \sqrt{25}  \\  \\ r = 5

asambeis [7]2 years ago
3 0

Answer:

radius = 5 units

Step-by-step explanation:

The radius is the distance from the centre to a point on the circle.

Calculate r using the distance formula

r = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = (1, 3) and (x₂, y₂ ) = (4, 7)

r = \sqrt{(4-1)^2+(7-3)^2}

  = \sqrt{3^2+4^2}

   = \sqrt{9+16}

   = \sqrt{25}

   = 5

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