## xxfreshboy 3 years ago Find the length of RQ

1. xxfreshboy

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2. No-data

|dw:1332714513106:dw|

3. No-data

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

4. antonioms

What do I do I am lost for sure

5. No-data

I think you just have to use some trygonometry

6. xxfreshboy

its geometry.

7. No-data

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

8. No-data

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

9. No-data

and RD = DQ

10. No-data

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

11. No-data

Thank you.

12. antonioms

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

13. No-data

With some reasonable asumptions. that RQ is perpendicular to CD

14. No-data

Then you get an Isosceles triangle.

15. No-data

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

16. kell1170

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

17. No-data

Well I my country is it taught as Modern Geometry.

18. No-data

in my country*

19. kell1170

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

20. xxfreshboy

first year geometry?

21. kell1170

10th grade geometry. And first time taking it.

22. xxfreshboy

ooo where are you up to n your class?

23. No-data

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

24. kell1170

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. No-data

Well that is far more advanced than modern geometry.

26. kell1170

Really?

27. No-data

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

28. kell1170

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

29. No-data

Yes I know.

30. kell1170

What is it?

31. No-data

360º

32. No-data

Am I wrong?

33. kell1170

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

34. No-data

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

35. No-data

90º + 90º + 90º + 90º = 360º

36. kell1170

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

37. No-data

You're welcome.

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