parallel lines geometry question

this is all the inforamtion i was given

• Given:Three lines m, , and l as shown
  m< 1 + m < 2 = 180°
  Prove: m < 4 = m < 3
  Exercise 4
  Proof ___________________________________________________________________________

  Statements

  Reasons

  ___________________________________ 1 and 3 are supplementary m 1 + m 3 = 180° m 1 + m 2 = m 1 + m 3 m 2 = m 3 4 and 2 are vertical angles ___________________________________ ___________________________________ Given ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Vert. ‘s are = in measure Transitive law