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Sunshine447

  • 3 years ago

In circle A shown below, mArc BC is 71° and mArc EF is 78°. http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0801_03/image0044e847a03.gif What is m∡FDE?

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  1. Sunshine447
    • 3 years ago
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    @CliffSedge @jim_thompson5910 @ParthKohli

  2. Mikael
    • 3 years ago
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    |dw:1346794160576:dw| Inner angle equals the aritmetic average of its supporting arcs on both sides

  3. Sunshine447
    • 3 years ago
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    okay...........

  4. Mikael
    • 3 years ago
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    Did you undestand what to compute ?

  5. Sunshine447
    • 3 years ago
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    not really...

  6. Mikael
    • 3 years ago
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    |dw:1346794316086:dw|

  7. Sunshine447
    • 3 years ago
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    so is it 78?

  8. Mikael
    • 3 years ago
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    Meant FDE of course

  9. Mikael
    • 3 years ago
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    Come on - who are the 2 supporting arcs?

  10. Sunshine447
    • 3 years ago
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    what do you mean?

  11. Mikael
    • 3 years ago
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    |dw:1346794469021:dw|

  12. Mikael
    • 3 years ago
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    (78 +71)/2

  13. Sunshine447
    • 3 years ago
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    so its 74.5?

  14. Sunshine447
    • 3 years ago
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    @Mikael is it 74.5?

  15. Mikael
    • 3 years ago
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    Y + mdl pls

  16. CliffSedge
    • 3 years ago
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    Here's a good reference: http://www.mathwarehouse.com/geometry/circle/angles-of-intersecting-chords-theorem.php

  17. Sunshine447
    • 3 years ago
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    thanks @CliffSedge

  18. Sunshine447
    • 3 years ago
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    @Mikael so it IS 74.5? I really need a final answer

  19. Mikael
    • 3 years ago
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    Plese click on Blue (ribbon)

  20. Sunshine447
    • 3 years ago
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    not until u tell me if 74.5 is correct

  21. Sunshine447
    • 3 years ago
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    i need a final answer. I posted this so i could get help, not try to learn something and then hope i get it right....

  22. Mikael
    • 3 years ago
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    (78 +71)/2 = 74.5

  23. Mikael
    • 3 years ago
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    ??? ...!

  24. CliffSedge
    • 3 years ago
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    Tsk tsk tsk, how embarrassing: Begging for medals . . .

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