## Emily778 Group Title If mB = mD = 39°, find mC so that quadrilateral ABCD is a parallelogram. The diagram is not to scale. (1 point) 39° 282° 141° 78° one year ago one year ago

1. Emily778

2. jim_thompson5910

m < C + m < D = 180 x + 39 = 180 solve for x

3. Emily778

would it be C? (141)

4. jim_thompson5910

yep

5. Emily778

Thankyou.

6. jim_thompson5910

ironic how angle C matches with choice C, but yeah it's correct

7. Emily778

Based on the information given, can you determine that the quadrilateral must be a parallelogram? Explain. Given: XY congruent to WZ and XW congruent to YZ (1 point) Yes; opposite sides are congruent. Yes; diagonals of a parallelogram bisect each other. Yes; two opposite sides are both parallel and congruent. No; you cannot determine that the quadrilateral is a parallelogram.

8. Emily778

Can you help me with this one ?

9. jim_thompson5910

Draw a picture |dw:1358922647384:dw|

10. jim_thompson5910

XY = WZ (given) XW = YZ (given) opposite sides are congruent, so we definitely have a parellelogram

11. Emily778

would it be a?

12. jim_thompson5910

yep

13. Emily778

wait, are you sure it's not c?

14. Emily778

can you help me with this? mR = 130 and mS = 80. Find mT. The diagram is not to scale. (1 point) 65 70 35 80

15. Emily778

Hello?

16. jim_thompson5910

no it wouldn't be c because we can't determine the two opposite sides are parallel (yet)

17. jim_thompson5910

the only thing we are given is that the opposite sides are congruent

18. jim_thompson5910

Draw a line down the middle like this |dw:1358923282188:dw|

19. Emily778

ok

20. jim_thompson5910

then fill in what you know |dw:1358923381801:dw| Note: segment RT is a angle bisector of angle SRU, so angle SRT is half of angle SRU (130/2 = 65)

21. jim_thompson5910

solve for x, then double the value of x to get the angle T

22. Emily778

how do I solve for x for this?

23. jim_thompson5910

if you're not sure how to get x, add up all the angles and they should result in 180 degrees so x+65+80 = 180

24. Emily778

is it c?

25. jim_thompson5910

close, but you have to double it

26. jim_thompson5910

|dw:1358923649111:dw|

27. jim_thompson5910

|dw:1358923661794:dw|

28. Emily778

oh, thankyou. Can you help me with 2 more? Or no?

29. jim_thompson5910

sure i can help

30. Emily778

In the coordinate plane, three vertices of rectangle HIJK are H(0, 0), I(0, d), and K(e, 0). What are the coordinates of point J? (1 point) (2e, 2d) (d, e) (e, d) And the picture is the last answer

31. jim_thompson5910

draw a pic |dw:1358923988803:dw|

32. jim_thompson5910

do you see what point that last point (? , ?) should be

33. Emily778

I don't get the answers shown..

34. jim_thompson5910

what is the x coordinate of this point here |dw:1358924165773:dw|

35. Emily778

E?

36. jim_thompson5910

and what is the y coordinate of this point here |dw:1358924211028:dw|

37. jim_thompson5910

any ideas?

38. Emily778

is it c? :)

39. jim_thompson5910

yep the answer is (e, d)

40. jim_thompson5910

|dw:1358924527223:dw|

41. Emily778

THANK YOU

42. jim_thompson5910

you're welcome