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anonymous

  • 5 years ago

In the figure, E is the midpoint of side CB of rectangle ABCD and x=45. AB is 3 cm, what is the area of rectangle ABCD, in square cm

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  1. anonymous
    • 5 years ago
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    which figure?

  2. anonymous
    • 5 years ago
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    you can take a picture of the rectangle from your book and attach it as a file here

  3. anonymous
    • 5 years ago
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    uploading it now

  4. anonymous
    • 5 years ago
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    Okay, AB is 3 cm, And x or DE is 45 cm.

  5. anonymous
    • 5 years ago
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    so if AB is 3 cm, what is the length of DC?

  6. anonymous
    • 5 years ago
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    are you thinking about it?

  7. anonymous
    • 5 years ago
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    dc is 3

  8. anonymous
    • 5 years ago
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    and i don't think de is 45 cm

  9. anonymous
    • 5 years ago
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    In the figure above, E is the midpoint of side CB of rectangle ABCD, and ∠x = 45°. If AB is 3 centimeters, what is the area of rectangle ABCD, in square centimeters?

  10. anonymous
    • 5 years ago
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    I see x is the angle ade

  11. anonymous
    • 5 years ago
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    right

  12. anonymous
    • 5 years ago
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    okay, angle ADE is 45, what is the angle CDE?

  13. anonymous
    • 5 years ago
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    i think DC IS 3 and CE is also 3

  14. anonymous
    • 5 years ago
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    45-45-90 triangle

  15. anonymous
    • 5 years ago
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    okay good. I hope you got that tan 45 = CE/DC

  16. anonymous
    • 5 years ago
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    alright. So if CE is 3 cm and E is the midpoint of CB, what is the length of CB?

  17. anonymous
    • 5 years ago
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    6

  18. anonymous
    • 5 years ago
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    great! so what is the area of the rectangle?

  19. anonymous
    • 5 years ago
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    18

  20. anonymous
    • 5 years ago
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    yes, you should say 18 sq.cm though, because length and breadth are in cms.

  21. anonymous
    • 5 years ago
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    thank you very much

  22. anonymous
    • 5 years ago
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    you are welcome.

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