anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
Use the pythagoreon theroem!
anonymous
  • anonymous
Did you? What's up? Let's Math.

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More answers

anonymous
  • anonymous
um like this A^2 +B^2= C^2
anonymous
  • anonymous
You got it. You are given A and B. Let's do it. 7^2 + 9^2 = C^2.
anonymous
  • anonymous
49+81
anonymous
  • anonymous
@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.
anonymous
  • anonymous
Sweet whats 49+81?
AravindG
  • AravindG
sweet? o.O
anonymous
  • anonymous
130
anonymous
  • anonymous
Alright so far we know that 130 = C^2. What's C???
AravindG
  • AravindG
@Azteck you are right infact i had replied in previos question and when i saw this i thought my reply got deleted :O .
anonymous
  • anonymous
I think it's a different question, but then it's just using the same format as the previous one.
anonymous
  • anonymous
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?
anonymous
  • anonymous
idk sorry
anonymous
  • anonymous
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
anonymous
  • anonymous
\[\sqrt{9}\]
anonymous
  • anonymous
idk :/
anonymous
  • anonymous
haha alright :) Let's learn some square roots then. I'm not a math teacher but i'll try my best.
anonymous
  • anonymous
ok thanks for helping btw
anonymous
  • anonymous
So basically a square root is " What number multiplied by itself will give me this number"
AravindG
  • AravindG
@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! :)
anonymous
  • anonymous
@AravindG Thanks! Happy internet moderating.
anonymous
  • anonymous
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
anonymous
  • anonymous
wouldnt it be 3 to the first 1 u asked
anonymous
  • anonymous
Yeah exactly. 3*3 = 9. So the square root of 9 is three.
anonymous
  • anonymous
ok
anonymous
  • anonymous
Alright it works with letters or "variables" too. What's the square root of \[\sqrt{x^2}\] ?
anonymous
  • anonymous
x?
anonymous
  • anonymous
Nice. X*X = X^2. How about something that applies to us. What is the \[\sqrt{C^2}\]
anonymous
  • anonymous
c
AravindG
  • AravindG
well done @somebodys_heartbrake and @RandomFriend :)
anonymous
  • anonymous
Nailed it. So we left off at \[C^2 = 130\]. What happens if we take the square root of both sides?
anonymous
  • anonymous
um not sure
anonymous
  • anonymous
Write it out for me. Put a square root symbol around both sides.
anonymous
  • anonymous
idk how to do that
AravindG
  • AravindG
......................
anonymous
  • anonymous
Alright so we are just going to draw a square root sign around both sides. You can do it. I'll do it first. \[\sqrt{C^2} = \sqrt{130}\]
AravindG
  • AravindG
@somebodys_heartbrake please make a thorough reading on this tutorial http://www.mathsisfun.com/square-root.html
anonymous
  • anonymous
@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.
anonymous
  • anonymous
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?
anonymous
  • anonymous
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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