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shewolfangz Group Title

a triangle and a rectangle are drawn on a page so that they overlap as shown. inside these figures are placed the digits from 0 to 9. if there are six digits in the triangle and eight digits in the rectangle, how many digits are in the part that belongs to both figures

  • 2 years ago
  • 2 years ago

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  1. shewolfangz Group Title
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    i dnt ge the working out

    • 2 years ago
  2. shewolfangz Group Title
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    get*

    • 2 years ago
  3. hartnn Group Title
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    six digits in the triangle-->Let T =6 eight digits in the rectangle---->Let R=8 Total = 10 digits. = T union R (in other words, T OR R) get this much ?

    • 2 years ago
  4. shewolfangz Group Title
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    how do u get 10 digits?

    • 2 years ago
  5. hartnn Group Title
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    0 to 9 means total 10 digits i assumed that the digits are not repeated, which is a fair assumption here...

    • 2 years ago
  6. shewolfangz Group Title
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    ohk...no they not repeated

    • 2 years ago
  7. hartnn Group Title
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    digits are in the part that belongs to "both" figures = T AND R (T intersection R) = ...... there is a formula for this, you know ? in terms of T,R and T UNION R

    • 2 years ago
  8. shewolfangz Group Title
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    but..how do u do year 7 working out..im suposed to draw the diagram and stuff..

    • 2 years ago
  9. hartnn Group Title
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    'year 7 working out.' ?? i didn't get you..

    • 2 years ago
  10. hartnn Group Title
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    |dw:1352896076101:dw|

    • 2 years ago
  11. shewolfangz Group Title
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    im in year 7

    • 2 years ago
  12. shewolfangz Group Title
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    |dw:1352896192555:dw|

    • 2 years ago
  13. shewolfangz Group Title
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    that's what the question look like

    • 2 years ago
  14. hartnn Group Title
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    |dw:1352896267033:dw| i am not sure i can give you exact working required by your course/teacher, but i can make u understand how to get the answer....

    • 2 years ago
  15. shewolfangz Group Title
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    ok..

    • 2 years ago
  16. hartnn Group Title
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    now look at that figure, if u want total area of composite figure, will it be appropiate to add the area of triangle and rectangle ?

    • 2 years ago
  17. shewolfangz Group Title
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    um...no?

    • 2 years ago
  18. hartnn Group Title
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    why ?

    • 2 years ago
  19. shewolfangz Group Title
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    i don't know

    • 2 years ago
  20. shewolfangz Group Title
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    by the area of composite figure do u mean the overlapped shape?

    • 2 years ago
  21. hartnn Group Title
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    yes,. because then you will consider the "intersection part" twice. once in rectangle and once in triangle, got this ?

    • 2 years ago
  22. shewolfangz Group Title
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    um..kinda

    • 2 years ago
  23. hartnn Group Title
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    so to get area of composite figure, u need to subtract are of intersection, right ?

    • 2 years ago
  24. shewolfangz Group Title
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    ..uh..yea..

    • 2 years ago
  25. hartnn Group Title
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    so , we get TOTAL = RECT +TRIANGLE - INTERSECTION. in this case, total = 10 , Rect = 8, triangle =6 u just need intersection

    • 2 years ago
  26. shewolfangz Group Title
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    uhuh

    • 2 years ago
  27. hartnn Group Title
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    not clear ?

    • 2 years ago
  28. shewolfangz Group Title
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    clear

    • 2 years ago
  29. hartnn Group Title
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    so, 10 = 8+6-x where x is digits that belongs to both figures

    • 2 years ago
  30. hartnn Group Title
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    x= ?

    • 2 years ago
  31. shewolfangz Group Title
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    hmm equations..lets see

    • 2 years ago
  32. shewolfangz Group Title
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    4?

    • 2 years ago
  33. hartnn Group Title
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    yes, so there are 4 numbers that belong to both..

    • 2 years ago
  34. shewolfangz Group Title
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    ohk..

    • 2 years ago
  35. hartnn Group Title
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    will u be able to solve similar problems ?

    • 2 years ago
  36. shewolfangz Group Title
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    i think so yes

    • 2 years ago
  37. shewolfangz Group Title
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    thnx for ur help hartnn

    • 2 years ago
  38. shewolfangz Group Title
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    now i need to get back to my other hw

    • 2 years ago
  39. hartnn Group Title
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    welcome ^_^ and good luck....

    • 2 years ago
  40. shewolfangz Group Title
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    thnx for help!!!

    • 2 years ago
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