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vmathhelp Group Title

Can someone help me with Geo Problem! Diagonal AC divides a trapezoid ABCD two similar triangles ABC and ACD. Find AC if BC=4cm and AD=9cm

  • one year ago
  • one year ago

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  1. vmathhelp Group Title
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    @ganeshie8 I need help

    • one year ago
  2. vmathhelp Group Title
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    @ghazi @lalaly @AccessDenied

    • one year ago
  3. kajolc.2496 Group Title
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    Are these triangles similar by area?

    • one year ago
  4. kajolc.2496 Group Title
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    Is not there any fig. for this?

    • one year ago
  5. campbell_st Group Title
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    I think it looks like this|dw:1356206771435:dw| the angles marked x are equal by alternate angles in parallel lines

    • one year ago
  6. ghazi Group Title
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    |dw:1356207039082:dw|

    • one year ago
  7. vmathhelp Group Title
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    Now what do i do?

    • one year ago
  8. ghazi Group Title
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    have you provided whole information?

    • one year ago
  9. vmathhelp Group Title
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    yes

    • one year ago
  10. kajolc.2496 Group Title
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    I think there is something we r missing..

    • one year ago
  11. campbell_st Group Title
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    well the corresponding sides in the triangles are triangle ABC and triangle ACD are AB AC AB DC BC AD now you need to use the ratio's of corresponding sides in similar triangles

    • one year ago
  12. kajolc.2496 Group Title
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    but ques. does'nt say that it divides the triangles in equal areas!

    • one year ago
  13. kajolc.2496 Group Title
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    that's wat i was confirming earlier

    • one year ago
  14. vmathhelp Group Title
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    AD:BC = 2.25

    • one year ago
  15. kajolc.2496 Group Title
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    SIMILARITY CAN ONLY BE USED WHEN AREAS ARE EQUAL

    • one year ago
  16. campbell_st Group Title
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    oops corresponding side should be AC and DC so using the ratio of corresponding sides \[\frac{4}{9} = \frac{AB}{AC}= \frac{AC}{ DC}\]

    • one year ago
  17. vmathhelp Group Title
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    what happens next?

    • one year ago
  18. vmathhelp Group Title
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    @campbell_st

    • one year ago
  19. campbell_st Group Title
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    who knows.... it doesn't make sense to me... there seems to be something missing from the question.

    • one year ago
  20. campbell_st Group Title
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    Oh, and triangles can be similar and have different areas the ratio will be the linear ratio squared. so the ratio of areas in the triangles is ABC:ACD = (4/9)^2

    • one year ago
  21. vmathhelp Group Title
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    @ghazi is there missing info?

    • one year ago
  22. ghazi Group Title
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    i am confused

    • one year ago
  23. vmathhelp Group Title
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    wat r u confused about?

    • one year ago
  24. ghazi Group Title
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    there is something missing in it

    • one year ago
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