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ashley_fay

Find the value of x

  • one year ago
  • one year ago

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  1. ashley_fay
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    • one year ago
  2. Azteck
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    triangle CDE is similar to BAC. Therefore you just use proportions.

    • one year ago
  3. Azteck
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    \[\frac{ 42 }{ 6 }=\frac{ x }{ 32-x }\] Solve for x.

    • one year ago
  4. Azteck
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    I'm not sure if there's more to the question, but if there is and you're learning similarity, then it's certain that's what you should do. But if not, then it's a doozy. I will have to take another look at it later.

    • one year ago
  5. ashley_fay
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    it just says to round your answer to two decimal places. thanks for the help

    • one year ago
  6. Azteck
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    @ashley_fay Are you learning similarity at school?

    • one year ago
  7. ashley_fay
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    i was earlier but that was at the beginning of the unit and i kind of forgot about it.

    • one year ago
  8. Azteck
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    What topic is this on? When you got these questions, what topic is this?

    • one year ago
  9. ashley_fay
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    studying for the unit quiz

    • one year ago
  10. Azteck
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    That doesn't give me a clue what topic you're learning when you got these questions.

    • one year ago
  11. ashley_fay
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    ummm Geometry?? well the practice is a review over the whole unit soo thats why i said that but before this practice i was learning about trigonometric ratios

    • one year ago
  12. Azteck
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    Does the question just say find the value of x. Is there more to it? Does the image have any parallel lines or angles involved?

    • one year ago
  13. ashley_fay
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    it says: Given that triangle ABC~triangle DEC, Find the value of x. If necessary round your answer to two decimal points

    • one year ago
  14. ashley_fay
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    i put the same exact image on here

    • one year ago
  15. Azteck
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    See, you only gave "solve for x instead of the whole question word for word. That's just leaving out vital information.

    • one year ago
  16. Azteck
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    So I was correct. Read what I wrote above and solve for x.

    • one year ago
  17. ashley_fay
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    x=28

    • one year ago
  18. RadEn
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    does the line of BC perpendicular with line CE ?? is there sign right angles there ??

    • one year ago
  19. RadEn
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    if yes, use the similarity property and we get the proportion : x/6 = 42/(32-x) solve for x

    • one year ago
  20. RadEn
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    @Azteck, which triangles were similar ? i think u take incorrect proportion ?

    • one year ago
  21. RadEn
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    |dw:1359767903897:dw|

    • one year ago
  22. RadEn
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    so, x/6 = 42/(32-x) , simplify x(32-x) = 6(42) 32x-x^2 = 6(42) x^2 - 32x + 6(42) = 0 (x-14)(x-18) = 0 solve for x by take the zeroes each terms .. (there are 2 x's are possible)

    • one year ago
  23. Azteck
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    ABC is similar to DEC...Angle B is equal to angle E.

    • one year ago
  24. Azteck
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    Angle A is equal to Angle D....

    • one year ago
  25. Azteck
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    Angle C is equal to Angle C....

    • one year ago
  26. Azteck
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    You got it wrong @RadEn

    • one year ago
  27. RadEn
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    can u give some reason that angle C is equal to angle C, while the measure of angle C is not known :P

    • one year ago
  28. RadEn
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    but if u look my diagram, in triangle ABC exactly : mACB + mABC = 90 or alpha + mABC = 90 degrees or mABC = 90-alpha ... (1) mACB + mBCE + mDCE = 180 or mACB + 90 + mDCE = 180 (supplement angles) mACB + mDCE = 180-90 mACB + mDCE = 90 alpha + mDCE = 90 mDCE = 90 - alpha ... (2) (1) = (2), that's why mABC = mDCE

    • one year ago
  29. Azteck
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    Look at your angles...Your angles are muddled up. How do you know that EDA is 90 degrees. That's your assumption. The question only gave a statement saying that there two triangles which are similar. It doesn't say "the angle is 90 degrees, etc. You will instantly be incorrect if you don't abide to the quesiton and create something out of thin air...

    • one year ago
  30. Azteck
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    there are two*

    • one year ago
  31. Azteck
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    "can u give some reason that angle C is equal to angle C, while the measure of angle C is not known :P " This is where the top students know what to do. They use there brain and the question to their advantage. the question says "Given that triangle ABC~triangle DEC, Find the value of x. If necessary round your answer to two decimal points " Now here's the trick, I will draw it for you.

    • one year ago
  32. Azteck
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    |dw:1359925509626:dw| Each angle corresponds wiht the other angle in relation to where they are put in order. If it was ACB is similar to DEC, then Angle C is equal to angle E.

    • one year ago
  33. Azteck
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    These are very minor things that place the average students and talented students in different positions. That's something you should know.

    • one year ago
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