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Flapdragon

  • 2 years ago

What is the diameter of this circle if BC=17 and DC=30?

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  1. Flapdragon
    • 2 years ago
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  2. Callisto
    • 2 years ago
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    |dw:1334734918657:dw| Use Pyth Thm (17+r)^2 = 30^2 +r^2 289 + 34r +r^2 = 900 + r^2 34r = 611 r= ... Diameter = 2r= ...

  3. Callisto
    • 2 years ago
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    The number was ugly...

  4. Flapdragon
    • 2 years ago
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    Thank you again! c: I didn't realize that it was a right triangle at first, somehow...

  5. Callisto
    • 2 years ago
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    Whenever you see a tangent, see a centre, join them, you'll get a right angle triangle. Then, things are usually easier :)

  6. Flapdragon
    • 2 years ago
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    Oh, okay! Thanks for the tip! :D

  7. Callisto
    • 2 years ago
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    Welcome :) Hope it helps

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