Writing Proofs: Congruent Triangles Recall 1. Vertical Angles Steps for Writing Proofs 1. Mark the Given. 2. Midpoint 2. Mark … Reflexive Sides / Vertical Angles 3. Bisect 3. Choose a Method. (SSS , SAS, ASA) 4. List the Parts … in the order of the method. 4. Reflexive Property 5. Fill in the Reasons … why you marked the parts. 5. Parallel Lines Example 1: Statements Reasons Example 2: Example 3: Example 4: Statements Reasons Statements Reasons Statements Reasons