2.2.1 Algebraic Proof − Practice
1. Solve the equation. Write a justification for each step. − = + n 4 7 6
2. Solve the equation. Write a justification for each step. − 3( − x − 2) = 5 x − 9
3. Identify the property that justifies the statement. AB = MN and MN = PQ , so AB = PQ .
4. Identify the property that justifies the statement. ∠ XYZ ≅ ∠ PDQ and ∠ PDQ ≅ ∠ ABC , so ∠ XYZ ≅ ∠ ABC .
5. Identify the property that justifies the statement. △ DEF ≅ △ DEF
6. Identify the property that justifies the statement. OP ≅ RS , so RS ≅ OP
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