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Curry

  • 4 years ago

ABC is a triangle with sides AB = 6m, BC =8m, and AC = 10m. A line k in the plane of the triangle ABC moves along the segment AC at the rate of 1cm per sec. The line starts at A and ends at C and is always perpendicular to AC. 1. How long does it take the line to reach the point B? 2. How long does it take the line to bisect the area of the triangle? 3. What is the area of the region that the line sweeps in its movement after 6min 45 sec? 4.What is the area of the region that the line sweeps at any give moment from the start of its movement?

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  1. Curry
    • 4 years ago
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    i solved the first one and i got 6 minutes

  2. anonymous
    • 4 years ago
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    ya that one i got also 6

  3. Curry
    • 4 years ago
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    number 2 is really killing me

  4. anonymous
    • 4 years ago
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    sorry i suck at geometry. I dont even remeber learning this stuff in hs

  5. Curry
    • 4 years ago
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    this is part of precalc trust me it looks simple but it is hard

  6. anonymous
    • 4 years ago
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    lol but it really falls under geometry i think

  7. Curry
    • 4 years ago
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    lol where are all the genuises

  8. anonymous
    • 4 years ago
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    Hey sal

  9. anonymous
    • 4 years ago
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    I dont fall under the category of genius :D

  10. anonymous
    • 4 years ago
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    hey rld, haha me neither... and what a weird question. what course is this for?

  11. anonymous
    • 4 years ago
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    pre calc

  12. Curry
    • 4 years ago
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    precalc

  13. anonymous
    • 4 years ago
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    ok so first thing is, did you do any work?

  14. Curry
    • 4 years ago
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    its to make u use skills that u have already acquired through critical thinking

  15. anonymous
    • 4 years ago
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    cool never took such a course

  16. Curry
    • 4 years ago
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    wat do u mean work i solved the first part but no matterf what i do i cant solve 2

  17. anonymous
    • 4 years ago
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    ok how did you get 6 minutes?

  18. anonymous
    • 4 years ago
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    lol ya cuz what is the height of the triangle

  19. anonymous
    • 4 years ago
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    ok so it is a right angle triangle, you can tell from the dimension. 6, 8, 10

  20. anonymous
    • 4 years ago
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    line K, is always perpendicular to AC which is the HYP. of the right angle triangle and is 10 meters.

  21. anonymous
    • 4 years ago
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    sal to the rescue

  22. Curry
    • 4 years ago
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    i need 2 i found 3

  23. anonymous
    • 4 years ago
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    ok, you sure part 1 and 3 are right?

  24. Curry
    • 4 years ago
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    well check my work for 3 i got 41/84 as the area

  25. Curry
    • 4 years ago
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    41.84 as the area

  26. Curry
    • 4 years ago
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    not 41/84

  27. Curry
    • 4 years ago
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    not 41/84

  28. anonymous
    • 4 years ago
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    yeh 1 is correct.. it is 6 minutes

  29. Curry
    • 4 years ago
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    3?

  30. Curry
    • 4 years ago
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    wait nvm

  31. Curry
    • 4 years ago
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    its 10.7241 as the area check that answer

  32. anonymous
    • 4 years ago
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    ok so for 3, you have 6*60+45=405seconds, and times cm per second you get 405 cm convert to meters. 4.05 meters, (6^2-4.05^2)^1/2= you get the third side= 4.427 area of triangle= 0.5*4.426*4.05=8.96

  33. Curry
    • 4 years ago
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    thats wrong cause its a trap after 3.96 so if its 4.05 its a trapu cant use traingle formua

  34. Curry
    • 4 years ago
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    trapezoiod

  35. anonymous
    • 4 years ago
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    ohhh haha, really is it like that?

  36. anonymous
    • 4 years ago
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    totally missed that

  37. Curry
    • 4 years ago
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    ye

  38. anonymous
    • 4 years ago
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    then for 2, i think you have to relate the triangle at the top, with the one at the bottom interms of areas, and in terms of lengths and solve the 2 equations with 2 unknowns

  39. anonymous
    • 4 years ago
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    iight, i g2g hopefully you can figure it out on your own, if not maybe other ppl will be able to help but i gotta go. sorry

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