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somebodys_heartbrake

  • 2 years ago

Find c if a = 7 and b = 9. Right triangle with sides a, b, and c. Side c is opposite the right angle. A. c = 16 B. c = 4 C. c = 3 times the square root of 7 D. c = the square root of130

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  1. somebodys_heartbrake
    • 2 years ago
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  2. RandomFriend
    • 2 years ago
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    Use the pythagoreon theroem!

  3. RandomFriend
    • 2 years ago
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    Did you? What's up? Let's Math.

  4. somebodys_heartbrake
    • 2 years ago
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    um like this A^2 +B^2= C^2

  5. RandomFriend
    • 2 years ago
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    You got it. You are given A and B. Let's do it. 7^2 + 9^2 = C^2.

  6. somebodys_heartbrake
    • 2 years ago
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    49+81

  7. Azteck
    • 2 years ago
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    @somebodys_heartbrake that's exactly the same question as the previous one except this one has different values. And now you don't know square roots and squaring which should of been taught in primary/elementary school.

  8. RandomFriend
    • 2 years ago
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    Sweet whats 49+81?

  9. AravindG
    • 2 years ago
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    sweet? o.O

  10. somebodys_heartbrake
    • 2 years ago
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    130

  11. RandomFriend
    • 2 years ago
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    Alright so far we know that 130 = C^2. What's C???

  12. AravindG
    • 2 years ago
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    @Azteck you are right infact i had replied in previos question and when i saw this i thought my reply got deleted :O .

  13. Azteck
    • 2 years ago
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    I think it's a different question, but then it's just using the same format as the previous one.

  14. RandomFriend
    • 2 years ago
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    Alright so far we know that C^2 = 130. Let's find C. Do you know how to find square roots, or are you a little bit rusty?

  15. somebodys_heartbrake
    • 2 years ago
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    idk sorry

  16. RandomFriend
    • 2 years ago
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    Do you know the square root of say 9? Or do you know nothing about square roots? I don't care either way so just be honest

  17. RandomFriend
    • 2 years ago
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    \[\sqrt{9}\]

  18. somebodys_heartbrake
    • 2 years ago
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    idk :/

  19. RandomFriend
    • 2 years ago
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    haha alright :) Let's learn some square roots then. I'm not a math teacher but i'll try my best.

  20. somebodys_heartbrake
    • 2 years ago
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    ok thanks for helping btw

  21. RandomFriend
    • 2 years ago
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    So basically a square root is " What number multiplied by itself will give me this number"

  22. AravindG
    • 2 years ago
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    @RandomFriend i appreciate your effort to help the asker get to the answer ..make sure you do not spoonfeed anyone in the process ,happy studying! :)

  23. RandomFriend
    • 2 years ago
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    @AravindG Thanks! Happy internet moderating.

  24. RandomFriend
    • 2 years ago
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    Anyway another way to look at square roots is "What number SQUARED, equals this number?" So lets look at \[\sqrt{4}\] . 2 squared . Aka 2*2 = 4

  25. somebodys_heartbrake
    • 2 years ago
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    wouldnt it be 3 to the first 1 u asked

  26. RandomFriend
    • 2 years ago
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    Yeah exactly. 3*3 = 9. So the square root of 9 is three.

  27. somebodys_heartbrake
    • 2 years ago
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    ok

  28. RandomFriend
    • 2 years ago
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    Alright it works with letters or "variables" too. What's the square root of \[\sqrt{x^2}\] ?

  29. somebodys_heartbrake
    • 2 years ago
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    x?

  30. RandomFriend
    • 2 years ago
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    Nice. X*X = X^2. How about something that applies to us. What is the \[\sqrt{C^2}\]

  31. somebodys_heartbrake
    • 2 years ago
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    c

  32. AravindG
    • 2 years ago
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    well done @somebodys_heartbrake and @RandomFriend :)

  33. RandomFriend
    • 2 years ago
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    Nailed it. So we left off at \[C^2 = 130\]. What happens if we take the square root of both sides?

  34. somebodys_heartbrake
    • 2 years ago
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    um not sure

  35. RandomFriend
    • 2 years ago
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    Write it out for me. Put a square root symbol around both sides.

  36. somebodys_heartbrake
    • 2 years ago
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    idk how to do that

  37. AravindG
    • 2 years ago
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    ......................

  38. RandomFriend
    • 2 years ago
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    Alright so we are just going to draw a square root sign around both sides. You can do it. I'll do it first. \[\sqrt{C^2} = \sqrt{130}\]

  39. AravindG
    • 2 years ago
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    @somebodys_heartbrake please make a thorough reading on this tutorial http://www.mathsisfun.com/square-root.html

  40. Azteck
    • 2 years ago
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    @somebodys_heartbrake wants to know how to write a square root sign like what @RandomFriend did above. I don't think @somebodys_heartbrake knows how to use the equation editor.

  41. RandomFriend
    • 2 years ago
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    I dont care if you don't know how to use the equation thing. As long as you get it. Do you see how i got my equation above?

  42. RandomFriend
    • 2 years ago
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    Alright I'ma move on. from here \[\sqrt{C^2} = C. \]. This givese us C = sqrt(130). Which was one of our answers I believe.

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