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anonymous

  • one year ago

the coordinates of the of the vertices of a triangle are A(1,3), B(9,10), and C(11,18). find the perimeter of triangle ABC. Find the perimeter of the triangle when the coordinates are multiplied by 3.

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  1. anonymous
    • one year ago
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    anyone please help meh?

  2. sohailiftikhar
    • one year ago
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    do you know the formula of perimeter of triangle ?

  3. anonymous
    • one year ago
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    you um add the three sides up?

  4. sohailiftikhar
    • one year ago
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    wait

  5. anonymous
    • one year ago
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    ok

  6. anonymous
    • one year ago
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    have you finally found an answer? it's 2 here :O

  7. anonymous
    • one year ago
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    yayyyyyyyyyyyyyy

  8. sohailiftikhar
    • one year ago
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    first answer is 36.89

  9. anonymous
    • one year ago
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    at least give me the three numbers to add...

  10. sohailiftikhar
    • one year ago
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    ok

  11. sohailiftikhar
    • one year ago
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    A(1,3), B(9,10), and C(11,18). then the sides will be AB,BC,CA

  12. sohailiftikhar
    • one year ago
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    so now you can find the sides ig

  13. anonymous
    • one year ago
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    just need the three sides' number that all

  14. sohailiftikhar
    • one year ago
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    AB=B-A=(9-1)(10-7)=8i+3j now find it's magnitude

  15. anonymous
    • one year ago
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    btw when the sides all multiply by 3 the perometer just get multiplied by 3 right?

  16. anonymous
    • one year ago
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    does it have to be that complicated?

  17. sohailiftikhar
    • one year ago
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    yes

  18. sohailiftikhar
    • one year ago
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    first you have to find sides by distance formula then have to add then that's all .

  19. anonymous
    • one year ago
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    \[\sqrt{(y_1+y_2)^2+(x_1+x_2)^2}\]

  20. anonymous
    • one year ago
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    that's the formula for finding a side i THINK

  21. sohailiftikhar
    • one year ago
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    yes

  22. anonymous
    • one year ago
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    but when i plugged it in i got \(\sqrt{113}\)

  23. anonymous
    • one year ago
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    but how do u add them TOGETHER :O

  24. anonymous
    • one year ago
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    well... you are a HUMAN calculator, right?

  25. anonymous
    • one year ago
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    :P

  26. anonymous
    • one year ago
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    Use matrix method

  27. anonymous
    • one year ago
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    ?

  28. anonymous
    • one year ago
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    here's what i need: i need the three numbers for the sides of the triangle, the answers for the 3 questions, and a explanation for the last question.

  29. anonymous
    • one year ago
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    Well let me think 2 mins plz

  30. anonymous
    • one year ago
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    ok

  31. anonymous
    • one year ago
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    the formula to find the sides are -- Distance from A to B = |dw:1441269476718:dw| In that way you can find all the sides and then for the parameter the formula is , parameter = AB+BC+AC

  32. anonymous
    • one year ago
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    and i know that.

  33. anonymous
    • one year ago
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    then what's the problem solve it

  34. anonymous
    • one year ago
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    XD XD

  35. anonymous
    • one year ago
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    idk i get a diff answer every time that's why i needa check the sides and the answer bruh!

  36. anonymous
    • one year ago
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    well tell me your answer. I am solving it

  37. anonymous
    • one year ago
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    well which one? i have like 20 different answers

  38. anonymous
    • one year ago
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    well is there root of(113)?

  39. anonymous
    • one year ago
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    no...

  40. anonymous
    • one year ago
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    side AB = root of (113)

  41. anonymous
    • one year ago
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    Side BC= root of (68)

  42. anonymous
    • one year ago
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    ok.

  43. anonymous
    • one year ago
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    and side CA = root of (325)

  44. anonymous
    • one year ago
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    then the perimeter is [ root of 113+ root of 68+root of 325]

  45. anonymous
    • one year ago
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    ok...

  46. anonymous
    • one year ago
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    are you able to do the sum?

  47. sohailiftikhar
    • one year ago
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    and answer is 36.89

  48. sohailiftikhar
    • one year ago
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    which i have told before

  49. anonymous
    • one year ago
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    its not likie absolute tho like ther eare decimals and stuff

  50. anonymous
    • one year ago
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    the answer is 36.90

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