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## anonymous 4 years ago Find the length of RQ

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1. anonymous

|dw:1332714826151:dw|

2. anonymous

|dw:1332714513106:dw|

3. anonymous

You know that RC = 13 cm and CQ = 13 cm

4. anonymous

What do I do I am lost for sure

5. anonymous

I think you just have to use some trygonometry

6. anonymous

its geometry.

7. anonymous

You need to find RD and DQ first because RQ = RD + DQ

8. anonymous

$DQ=\sqrt{13^2-5^2}$

9. anonymous

and RD = DQ

10. anonymous

So $RQ=2\sqrt{13^2-5^2}$

11. anonymous

Thank you.

12. anonymous

Thank you but I still don't know how you broke it down

13. anonymous

With some reasonable asumptions. that RQ is perpendicular to CD

14. anonymous

Then you get an Isosceles triangle.

15. anonymous

You know the value of two sides of triangle DCQ. So you can use the phytagorean theorem.

16. anonymous

What kind of geometry is that? I'm in geometry and I don't remember that

17. anonymous

Well I my country is it taught as Modern Geometry.

18. anonymous

in my country*

19. anonymous

Oh dear... Modern geometry? I can barely handle the geometry I'm in. o.o I know the pathagroeum therom though!

20. anonymous

first year geometry?

21. anonymous

10th grade geometry. And first time taking it.

22. anonymous

ooo where are you up to n your class?

23. anonymous

Modern geometry is the study of triangles, and circles. Is not that difficult lady.

24. anonymous

We're doing translations, transformations, rotations, etc. And I don't know. You either get geometry or you don't. We've learned about circles and triangles and it was hard for me to understand.

25. anonymous

Well that is far more advanced than modern geometry.

26. anonymous

Really?

27. anonymous

Yes. Maybe you know it but you don't remember.

28. anonymous

Most likely... haha do you know how many degrees are in a square?

29. anonymous

Yes I know.

30. anonymous

What is it?

31. anonymous

360º

32. anonymous

Am I wrong?

33. anonymous

Oh I don't know! I didn't know that's why I asked!

34. anonymous

Well you just have to remember that a squared is formed by perpendicular lines. So they form 90º on each vertex.

35. anonymous

90º + 90º + 90º + 90º = 360º

36. anonymous

Well then yes, you're right. Thank you for your help! :D

37. anonymous

You're welcome.

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