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brianAC. Group Title

The two triangles illustrated below are similar. What are the values of x and y? (picture below) A. x = 3, y = 53 B. x = 9, y = 53 C. x = 6, y = 53 D. x = 3, y = 106

  • one year ago
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  1. brianAC. Group Title
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    |dw:1357798005747:dw|

    • one year ago
  2. lucy4104 Group Title
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    Are they proportional?

    • one year ago
  3. completeidiot Group Title
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    they are similar so yes they are proportional

    • one year ago
  4. syhna Group Title
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    the two triangle are similar , then the angles of the smaller triangle is the same with the bigger triangle, so "d" is already not an option now to get the value of y try this proportion 5:30 = x:18

    • one year ago
  5. lucy4104 Group Title
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    5 x 6 =30 X x 6 =18? X=3 angle y would be equivalent to the angle in the second triangle. Kay? >o<

    • one year ago
  6. lucy4104 Group Title
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    And so it would be answer choice A.

    • one year ago
  7. brianAC. Group Title
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    A? you sure?

    • one year ago
  8. mathstudent55 Group Title
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    Yes, A is correct In similar triangle, corresponding angle are congruent, so y = 53 Also, in similar triangle, the lengths of corresponding sides are proportional. You know the ratio 30/5. The other sides must be in the same ratio, so 18/x = 30/5

    • one year ago
  9. lucy4104 Group Title
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    yeah~ because if they really are proportional, the sides would have to be multiplied by the same constant.

    • one year ago
  10. lucy4104 Group Title
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    Do you understand? Need more elaboration?

    • one year ago
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