Quiz (1 point)

• ((m∠YWX) + (m∠WXY)) + (m∠XYW) = 180
• ((m∠YWX) + (m∠WXY)) + (m∠XYW) = 180
• 180 + 180 = 360
• ((a + b) + c) + ((d + e) + f) = ((((a + b) + c) + d) + e) + f

• if a = b, then a + c = b + c

• if the following are true:

  • a = b
  • b = c

  then a = c

• if the following are true:

  • a + b = c
  • d = b

  then a + d = c

• if quadrilateral ABCD is convex, then point A lies in interior of ∠BCD
• if point X lies in interior of ∠ABC, then m∠ABC = (m∠ABX) + (m∠XBC)
• if quadrilateral ABCD is convex, then point C lies in interior of ∠DAB
• if point X lies in interior of ∠ABC, then m∠ABC = (m∠ABX) + (m∠XBC)
• if (((m∠ABC) + (m∠BCA)) + (m∠CAB)) + (((m∠ACD) + (m∠CDA)) + (m∠DAC)) = (((((m∠ABC) + (m∠BCA)) + (m∠CAB)) + (m∠ACD)) + (m∠CDA)) + (m∠DAC), then (((m∠ABC) + (m∠BCA)) + (m∠CAB)) + (((m∠ACD) + (m∠CDA)) + (m∠DAC)) = (((m∠ABC) + (m∠CDA)) + ((m∠BCA) + (m∠ACD))) + ((m∠DAC) + (m∠CAB))

• if the following are true:

  • x = c + d
  • y = e + f

  then ((a + b) + (c + d)) + (e + f) = ((a + b) + x) + y

• if ((a + b) + c) + e = ((a + b) + g) + h, then ((a + b) + c) + e = ((a + g) + b) + h

• if the following are true:

  • a = b
  • b = c

  then a = c

• if the following are true:

  • a = b
  • a = c

  then b = 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.

Step	Claim	Reason (optional)	Error Message (if any)
1
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