Quiz (1 point)

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

• if a + b = c, then b = c + (a ⋅ (-1))

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

• if a + b = c, then b = c + (a ⋅ (-1))

• if the following are true:

  • a = c
  • b = c

  then a = b

• if (m∠WSX = 180) and (m∠YTZ = 180) and (m∠YTS = m∠TSX), then WX || YZ
• if (AC || XZ) and (m∠ABC = 180) and (m∠XYZ = 180), then AB || XY

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.