A conjecture and the flowchart proof used to prove the conjecture are shown. Given: AB¯¯¯¯¯∥XC−→−

Prove: m∠1+m∠2+m∠3=180°

A triangle with vertices labeled as A B and C. The interior angle C A B is labeled as 2, angle A C B is labeled as 1, and angle C B A is labeled as 3. Line X passes through upper vertex C and forms three angles. The interior angles are labeled as angle 4 and angle 5.

Drag and drop a statement to each box to complete the proof.