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perl

  • 2 years ago

Geometry Mathquestion for Loveya69

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  1. perl
    • 2 years ago
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    give me a second, lol

  2. LoveYou*69
    • 2 years ago
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    Okay cx

  3. perl
    • 2 years ago
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    how do you upload an image?

  4. LoveYou*69
    • 2 years ago
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    Attach File *I think*

  5. perl
    • 2 years ago
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    thanks

  6. perl
    • 2 years ago
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    sorry for the wait

  7. perl
    • 2 years ago
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    number 31

  8. perl
    • 2 years ago
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    |dw:1366882143016:dw|

  9. perl
    • 2 years ago
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    nope, doesnt have to be congruent

  10. perl
    • 2 years ago
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    we want it to be a parallelogram. only opposite sides of a parallogram have to be congruent, but thats not really going to be used here

  11. perl
    • 2 years ago
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    lets start with D)

  12. LoveYou*69
    • 2 years ago
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    Well, if DAB = 40º, and DCB = 40º then ADC = ABC which makes it a parallelogram right?

  13. perl
    • 2 years ago
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    i meant, not all 4 sides have to be congruent

  14. perl
    • 2 years ago
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    why does <ADC = <ABC?

  15. LoveYou*69
    • 2 years ago
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    because if those two angles are equal then wouldnt the other two that are across from each other be equal?

  16. Peter14
    • 2 years ago
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    not necessarily

  17. perl
    • 2 years ago
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    let me redraw that

  18. LoveYou*69
    • 2 years ago
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    Really Peter?:/ Try drawing that with those two angles equaling exactly 40º and see if you can get the other two angles not to equal each other.

  19. Peter14
    • 2 years ago
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    a kite

  20. perl
    • 2 years ago
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    |dw:1366882582720:dw|

  21. perl
    • 2 years ago
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    peter, oh yes a kite does satisfy these conditions , but is not a parallelogram

  22. Peter14
    • 2 years ago
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    are rhombuses (rhombii?) kites?

  23. .Sam.
    • 2 years ago
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    Can I post the solution? ;)

  24. perl
    • 2 years ago
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    sam, i would prefer you not, but...

  25. perl
    • 2 years ago
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    give loveyou a chance :)

  26. LoveYou*69
    • 2 years ago
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    DC and AB are congruent angles tho right? so if ABC = DCB then ADC = CBA which means DC = AB and DA = BC

  27. LoveYou*69
    • 2 years ago
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    Lets not give me a chance lol im making myself feel stupid

  28. Peter14
    • 2 years ago
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    how about this: look at all the choices from D to A and try to draw a counterexample for each one.

  29. perl
    • 2 years ago
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    peter, good idea :)

  30. LoveYou*69
    • 2 years ago
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    lol,letsnot, i didnt get sleep im too tired for this :P

  31. Peter14
    • 2 years ago
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    no, let's do it!

  32. LoveYou*69
    • 2 years ago
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    Feel free

  33. Peter14
    • 2 years ago
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    no! i'm volunteering you to do it! it's your problem... I already know the answer.

  34. LoveYou*69
    • 2 years ago
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    It's not my problem lol

  35. Peter14
    • 2 years ago
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    "Geometry Mathquestion for Loveya69"

  36. LoveYou*69
    • 2 years ago
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    It's not mine .-. If it was mine I'd be able to do it. I have 100 in my geometry class. but im not even doing this stuff in mine

  37. perl
    • 2 years ago
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    Definition: A kite is a quadrilateral with two distinct pairs of adjacent sides that are congruent. (1) The diagonals of a kite meet at a right angle. (2) Kites have exactly one pair of opposite angles that are congruent.

  38. Peter14
    • 2 years ago
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    thanks perl, I didn't remember that

  39. perl
    • 2 years ago
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    and here http://www.wyzant.com/help/math/geometry/quadrilaterals/trapezoids_and_kites

  40. perl
    • 2 years ago
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    peter I got B)

  41. mayankdevnani
    • 2 years ago
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    @perl in my opinion the answer would be option b and option d!!!!!

  42. perl
    • 2 years ago
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    option d is wrong, because you can produce a kite , b is right

  43. perl
    • 2 years ago
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    a kite satisfies option d and is not a parallelogram

  44. mayankdevnani
    • 2 years ago
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    but in quest. it is given that it is a parallegoram and in parallelogram , opposite sides are equal!!!!!

  45. mayankdevnani
    • 2 years ago
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    @perl and @Peter14

  46. Peter14
    • 2 years ago
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    no, in question it is given what conditions must be true for it to be a parallellogram

  47. mayankdevnani
    • 2 years ago
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    but what about angles of kite?????

  48. mayankdevnani
    • 2 years ago
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    @perl and @Peter14

  49. mayankdevnani
    • 2 years ago
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    |dw:1366929990059:dw|

  50. Peter14
    • 2 years ago
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    only two angles are given to be 40 degrees. The other two angles can be anything so that the sum of the 4 angles is 360 degrees

  51. mayankdevnani
    • 2 years ago
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    |dw:1366930082573:dw|

  52. mayankdevnani
    • 2 years ago
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    in triangle abc, it is an isosceles triangle. it means that angle 1=angle2!!!! right @Peter14

  53. Peter14
    • 2 years ago
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    sure. set the sum of angles 1 and 4 to 40 degrees and the sum of angles 2 and 5 will also be 40 degrees.

  54. Peter14
    • 2 years ago
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    sure, it could be a rhombus, and therefore a parallelogram, but you can't assume that.

  55. mayankdevnani
    • 2 years ago
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    @Peter14 for this time, please forgot the question, concerntrate on my question!!!!

  56. Peter14
    • 2 years ago
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    angles 3 and (not given) could vary. the sum just has to be 280.

  57. Peter14
    • 2 years ago
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    sure, let's go with your question. yes, angle 1 = angle 2 and angle 4= angle 5.

  58. mayankdevnani
    • 2 years ago
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    but in perl question!!!!!

  59. Peter14
    • 2 years ago
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    |dw:1366885812169:dw| so what about its angles?

  60. mayankdevnani
    • 2 years ago
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    angle 1=angle2 and angle4=angle 5

  61. Peter14
    • 2 years ago
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    yes... and?

  62. mayankdevnani
    • 2 years ago
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    and what?

  63. Peter14
    • 2 years ago
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    what exactly are you trying to prove here?

  64. mayankdevnani
    • 2 years ago
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    that adjacent angles are equal

  65. perl
    • 2 years ago
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    |dw:1366886101425:dw|

  66. perl
    • 2 years ago
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    its difficult to force this into a kite shape

  67. perl
    • 2 years ago
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    @Peter14 this definition is wrong: Definition: A kite is a quadrilateral with two distinct pairs of adjacent sides that are congruent. (1) The diagonals of a kite meet at a right angle. (2) Kites have exactly one pair of opposite angles that are congruent.

  68. Peter14
    • 2 years ago
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    (shrug) It doesn't really matter to me. I've already taken geometry.

  69. perl
    • 2 years ago
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    it doesnt have to be exactly one pair of congruent sides, both pairs could be congruent. here is an animation http://www.mathsisfun.com/definitions/kite.html

  70. perl
    • 2 years ago
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    for instance a square is a kite

  71. perl
    • 2 years ago
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    it should say, a kite has at least one pair of congruent angles

  72. perl
    • 2 years ago
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    @Peter14 here is a discussion, its a controversy http://answers.yahoo.com/question/index?qid=20100506151637AAPkWXY

  73. perl
    • 2 years ago
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    about kites!

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