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highschoolmom2010

  • one year ago

a right triangle ABC, C is the right angle and CD is the altitude drawn to the hypotenuse. If AD =3 and BD=9 what is AC? show work

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  1. highschoolmom2010
    • one year ago
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    thats as far as i got

  2. ganeshie8
    • one year ago
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    you may use geometric mean thingy to solve this or similiar triangles

  3. highschoolmom2010
    • one year ago
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    |dw:1375881597965:dw|

  4. ganeshie8
    • one year ago
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    pick one

  5. highschoolmom2010
    • one year ago
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    geometric mean bc im not really good at it

  6. ganeshie8
    • one year ago
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    okay ! memorize this :- AC is the geometric mean of AD and AB AC = geometric mean of 3 and 12

  7. ganeshie8
    • one year ago
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    |dw:1375881740808:dw|

  8. highschoolmom2010
    • one year ago
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    \[\sqrt{12*3}=\sqrt{36}=6\] like this

  9. ganeshie8
    • one year ago
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    yes !

  10. highschoolmom2010
    • one year ago
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    just refreshing on the work we did like a week or so ago

  11. ganeshie8
    • one year ago
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    here is the rule :- Each leg of a right triangle is the 'geometric mean' between the hypotenuse(12) and the segment of hypotenuse adjacent to the given leg(3)

  12. ganeshie8
    • one year ago
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    lol i was on vacation for 2 weeks. and i remember we doing these back then.. .

  13. highschoolmom2010
    • one year ago
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    yea thx @ganeshie8 :D

  14. ganeshie8
    • one year ago
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    np :)

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