Geometry practice test help! please. ?

Question

im taking some geometry practice tests and i am really confused. can someone help me? please. and thanks in advance.

link http://i127.photobucket.com/albums/p153/nanipics1/emamgeo009.jpg

i only need help with 6, 10, 11, 12, 13 and 14.

Answer 1

No.6

3X-12=X

2X=12

Answer: X=6

No.10

Answer: 90 degrees (definition of rhombus)

No.11

Answer: 60 degrees (Angle 1&2 must form 90 degrees)

No.12

Answer: >

No.13

Answer: =

No.14

Answer: <

Answer 2

i looked at it, then i realized i failed geometry.

Answer 3

for number 6, the two segments are equal (its a rule that bisected things are equal) so you just set x equal to the other part and solve like an equation. x=3x-12 (or whatever it was...i cant remember)

then 10. is 90 because it's a right angle

and 11. is 60 because 90-30 is 60 (the two angles combined were a right angle, 90)

hope that helps...good luck with the rest!!