Quiz (1 point)

• if (WX || YZ) and (m∠WSX = 180) and (m∠YTZ = 180), then m∠XST = m∠STY
• if m∠ABC = 180, then ∠ABX and ∠XBC are supplementary
• if ∠ABC and ∠DEF are supplementary, then (m∠ABC) + (m∠FED) = 180

• if the following are true:

  • a + b = c
  • b = d

  then a + d = c

• if (m∠ABC) + (m∠DEF) = 180, then ∠ABC and ∠DEF are supplementary

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.