## somebodys_heartbrake Group Title 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 one year ago one year ago

1. somebodys_heartbrake Group Title

2. RandomFriend Group Title

Use the pythagoreon theroem!

3. RandomFriend Group Title

Did you? What's up? Let's Math.

4. somebodys_heartbrake Group Title

um like this A^2 +B^2= C^2

5. RandomFriend Group Title

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

6. somebodys_heartbrake Group Title

49+81

7. Azteck Group Title

@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 Group Title

Sweet whats 49+81?

9. AravindG Group Title

sweet? o.O

10. somebodys_heartbrake Group Title

130

11. RandomFriend Group Title

Alright so far we know that 130 = C^2. What's C???

12. AravindG Group Title

@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 Group Title

I think it's a different question, but then it's just using the same format as the previous one.

14. RandomFriend Group Title

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 Group Title

idk sorry

16. RandomFriend Group Title

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 Group Title

$\sqrt{9}$

18. somebodys_heartbrake Group Title

idk :/

19. RandomFriend Group Title

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

20. somebodys_heartbrake Group Title

ok thanks for helping btw

21. RandomFriend Group Title

So basically a square root is " What number multiplied by itself will give me this number"

22. AravindG Group Title

@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 Group Title

@AravindG Thanks! Happy internet moderating.

24. RandomFriend Group Title

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 Group Title

wouldnt it be 3 to the first 1 u asked

26. RandomFriend Group Title

Yeah exactly. 3*3 = 9. So the square root of 9 is three.

27. somebodys_heartbrake Group Title

ok

28. RandomFriend Group Title

Alright it works with letters or "variables" too. What's the square root of $\sqrt{x^2}$ ?

29. somebodys_heartbrake Group Title

x?

30. RandomFriend Group Title

Nice. X*X = X^2. How about something that applies to us. What is the $\sqrt{C^2}$

31. somebodys_heartbrake Group Title

c

32. AravindG Group Title

well done @somebodys_heartbrake and @RandomFriend :)

33. RandomFriend Group Title

Nailed it. So we left off at $C^2 = 130$. What happens if we take the square root of both sides?

34. somebodys_heartbrake Group Title

um not sure

35. RandomFriend Group Title

Write it out for me. Put a square root symbol around both sides.

36. somebodys_heartbrake Group Title

idk how to do that

37. AravindG Group Title

......................

38. RandomFriend Group Title

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 Group Title

40. Azteck Group Title

@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 Group Title

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 Group Title

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.