Quiz (1 point)
Prove that:
The following properties may be helpful:
    - if m∠ABC = x, then m∠CBA = x
- if (m∠DAB = m∠CBA) and (m∠AXB = 180), then m∠DAX = m∠CBX
- if (WX || YZ) and (m∠RXZ = 180), then m∠WXR = m∠YZX
- if the following are true: - a = b
- b = c
 - then a = c 
- if m∠ZXY = m∠ZYX, then distance ZX = distance ZY
- if (AB || YZ) and (m∠AXB = 180), then AX || YZ
- if (AB || CD) and (DB || CA), then ABDC is a parallelogram
- if WXYZ is a parallelogram, then distance WZ = distance XY
- if distance AB = distance CD, then distance BA = distance DC
- if the following are true: - a = b
- b = c
 - then a = c 
Please write your proof in the table below. Each row should contain one claim. The last claim is the statement that you are trying to prove.