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karatechopper

  • 2 years ago

If ABJ=28, ABC "congruent to" DBJ, find JBC.

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  1. karatechopper
    • 2 years ago
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    |dw:1349137596618:dw|

  2. wio
    • 2 years ago
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    So we know: DBJ + ABJ = 90 DBJ = ABC DBC + ABC = 90 JBC + DBC + ABJ = 90

  3. wio
    • 2 years ago
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    And last but not least: ABJ = 28

  4. wio
    • 2 years ago
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    Do you know how to solve a system of equations?

  5. wio
    • 2 years ago
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    Actually it doesn't matter, we can solve this one angle at a time.

  6. wio
    • 2 years ago
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    First you need to find DBJ... what is DBJ?

  7. karatechopper
    • 2 years ago
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    I got 62 for DBJ

  8. wio
    • 2 years ago
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    Which is also ABC

  9. karatechopper
    • 2 years ago
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    Correct

  10. wio
    • 2 years ago
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    Now we need to find DBC

  11. karatechopper
    • 2 years ago
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    Well i know that 62=JBC+CBD now.. So then that also means ABC=JBC+CBD or! DBJ= JBC+CBD

  12. karatechopper
    • 2 years ago
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    Soo..this is where i get stuck at

  13. wio
    • 2 years ago
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    DBC + ABC = 90

  14. wio
    • 2 years ago
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    We use this fact to find CBD

  15. wio
    • 2 years ago
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    DBC and CBD are the same

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spraguer (Moderator)
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