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27 April, 23:17

What is the equation of a circle centered at the origin with radius 15?

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Answers (2)
  1. 27 April, 23:33
    0
    x^2 + y^2 = 225.

    Step-by-step explanation:

    The general form is x^2 + y^2 = r^2 where r = the radius of the circle.

    The radius is 15 so the equation is x^2 + y^2 = 15^2.

    That is x^2 + y^2 = 225.
  2. 27 April, 23:39
    0
    x² + y² = 225

    Step-by-step explanation:

    The equation of a circle centred at the origin is

    x² + y² = r² (where r is the radius)

    here r = 15, hence

    x² + y² = 15²

    x² + y² = 225 ← equation of circle
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