Question

10 POINTS!! Made myself broke with my last two questions!

Answer 1

Answer:

D

Step-by-step explanation:

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

Calculate r using the distance formula

r = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (- 5, - 12)

r = $\sqrt{(-5-0)^2+(-12-0)^2}$

  = $\sqrt{(-5)^2+(-12)^2}$

  = $\sqrt{25+144}$

  = $\sqrt{169}$

  = 13 → D