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needmathhelp7 3 years ago What is the value of y in the parallelogram below? if necessary, round your answer to two decimal places

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1. needmathhelp7

@jim_thompson5910 @mathstudent55 @Mertsj @skullpatrol @RyanL.

2. needmathhelp7

@zepdrix

3. needmathhelp7

@marsss

4. Ahsher97

...........what grade are you in that you cant answer that?

5. needmathhelp7

@Ahsher97 Wow you're nice -______- if you're not gonna help than don't come on here

6. zepdrix

|dw:1359070062371:dw|

7. zepdrix

Yah wow that's pretty rude... not everyone is learning on the same level as you ash :\

8. zepdrix

Since it's a quadrilateral, how many degrees in total do the interior angles add up to? :)

9. needmathhelp7

@zepdrix Awh, thanks! yeah, I'm just trying to finish up my math so I can graduate. It's all I have left, I just need a lil help! do they add up to 70 degrees? :)

10. zepdrix

lol no silly! :) In a triangle, the interior angles add to \(180^o\). In a quadrilateral the interior angles add to \(360^o\). Since we have a PARALLELOGRAM, the angles opposite one another will be equal.

11. Ahsher97

i didnt post that sorry my friend is over :/

12. zepdrix

If you look at the picture, that means that \(65^o=(2x+3)^o\) because those two angles are opposite one another. Ok ok but let's think a little bit differently, since we don't need \(x\). If that angle is 65, and the angle involving \(x\) is also 65, and we determined that a quadrilateral has 360 degrees total. Hmmmm. So those 2 angles \(65^o+65^o=130^o\) How much does that leave over for the other 2 angles? :D

13. needmathhelp7

Oh! So what's the opposite? @Ahsher97 Lol, it's all good :)

14. zepdrix

Oh thats weird :3 lol

15. Ahsher97

he shouldn't really talk he had to do summer school all four years of highschool

16. needmathhelp7

Lolol awhh poor guy xD well at least you didn't say that! I bet your friend was just kiddin' around anyway :)

17. needmathhelp7

@zepdrix is the opposite 65 degrees?

18. needmathhelp7

since the left angle is opposite? :)

19. tyteen4a03

@Ahsher97 Please be nice to askers, regardless of which grade he/she is in. You have been there at one point. Another way to look at this is by using Interior Angles property (i.e 65+5y =180)

20. zepdrix

|dw:1359070814837:dw|This upper angle is also 65 since it's opposite the 65 in a parallelogram. How many degrees does that leave us with for the OTHER two angles if these two are each 65, and a quadrilateral has 360 degrees total? :D

21. zepdrix

Am I confusing you gal? :c

22. needmathhelp7

no not at all! @zepdrix ! I think I got it! but idk :) so I did: 180-65= 115 and divided by 5

23. needmathhelp7

I got 23 :)

24. tyteen4a03

@zepdrix For these type of questions I wouldn't recommend using the sum of interior angles property, because extra steps are required. Instead use the interior angle property.

25. needmathhelp7

@tyteen4a03 You're great!! Could I do it like that? :)

26. zepdrix

yay good job \c:/

27. zepdrix

Yah I don't do a lot of geometry c: So I'm always at a loss as to how I should approach these problems :3

28. needmathhelp7

Awesome! thank you guys so much!! New question coming up :D

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