Question

Math help pls

The point (6,7) lies on a circle. What is the length of the radius of this circle if the centre of the circle is located at (2,3)?

(Grade 9 Math)

Answer 1

• 4√2 or 5.66 units

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Radius is the distance from a point on the circle to its center.

Given two points, use distance formula and find the radius:

• 
  `r=√((x_2-x_1)^2+(y_2-y_1)^2)`

• 
  `r=√((2-6)^2+(3-7)^2) =√(4^2+4^2) =√(2*4^2) =4√(2) =5.66\ units`