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iwanttogotostanford

  • one year ago

a chord 24 inches long is 5 inches from the center of a circle, as shown below. What is the radius of the circle, to the nearest tenth of an inch? (DIAGRAM DRAWN BELOW)

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  1. iwanttogotostanford
    • one year ago
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    |dw:1444182665406:dw|

  2. iwanttogotostanford
    • one year ago
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    @zepdrix @freckles @mathway @Nnesha

  3. zepdrix
    • one year ago
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    I assume they mean 5 inches perpendicular to the center or something like that. We need to know that those lines form a right angle. Anyway, this is just a simple application of the `Pythagorean Theorem` :)

  4. zepdrix
    • one year ago
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    |dw:1444182853766:dw|If the chord is length 24, what is this missing side length of the triangle?

  5. iwanttogotostanford
    • one year ago
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    we have to use the pythagorean theorem to find out

  6. zepdrix
    • one year ago
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    No.

  7. zepdrix
    • one year ago
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    It has something to do with the 24.

  8. iwanttogotostanford
    • one year ago
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    oh, half of that

  9. iwanttogotostanford
    • one year ago
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    so it would be 12 right?

  10. zepdrix
    • one year ago
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    |dw:1444182954940:dw|good good good :) So NOW you can apply your Pythagorean Theorem to find the radius value.

  11. iwanttogotostanford
    • one year ago
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    ok, so v^2=12^2+5^2

  12. zepdrix
    • one year ago
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    I'm not sure why you're using v lol but yes the set up looks correct!

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