Quiz (1 point)

• if ABCD is a rectangle, then ABCD is a parallelogram
• if ABCD is a parallelogram, then AB || DC
• if ABCD is a rectangle, then ∠ABC is a right angle
• if WX || YZ, then ∠WXZ and ∠XZY are supplementary
• if ∠ABC and ∠DEF are supplementary, then (m∠ABC) + (m∠DEF) = 180
• if ∠ABC is a right angle, then m∠ABC = 90

• if the following are true:

  • a + b = c
  • a = d

  then d + b = c

• if 90 + a = 180, then a = 90

• if m∠ABC = 90, then ∠ABC is a right angle

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.

Step	Claim	Reason (optional)	Error Message (if any)
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