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haleyking345

  • 2 years ago

Write the standard form of the equation of each circle described. a.) center at (0,0), radius 3 Square root 3

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  1. haleyking345
    • 2 years ago
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    |dw:1367681738477:dw|

  2. tcarroll010
    • 2 years ago
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    The equation (for circles at the center) in general is: x^2 + y^2 = r^2 All you have to do is substitute in for the "r".

  3. haleyking345
    • 2 years ago
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    3 square root of 3 squared. What would that equal?

  4. tcarroll010
    • 2 years ago
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    (3^2)(sqrt(3))^2

  5. rman3
    • 2 years ago
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    The standard form is x^2 + y^2 = r^2 3sqrt3 is equal to 27. Square the 3, which is 9. Then the sqrt of 3 which is just 3.

  6. tcarroll010
    • 2 years ago
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    So, (9)(sqrt(3))^2

  7. rman3
    • 2 years ago
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    Since the center is at 0,0 you don't need to change the x2 or y2

  8. tcarroll010
    • 2 years ago
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    And (sqrt(3))^2 = 3

  9. tcarroll010
    • 2 years ago
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    so, (3)^2 x (sqrt(3))^2 = 9 x 3 = 27

  10. haleyking345
    • 2 years ago
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    ok, that makes perfect sense. Thank you so much!!!!

  11. tcarroll010
    • 2 years ago
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    So, you have: x^2 + y^2 = (3 x sqrt(3))^2 x^2 + y^2 = 27

  12. tcarroll010
    • 2 years ago
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    Good luck in all of your studies and thx for the recognition! @haleyking345

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