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Vertical Angles and Angle Sum Theorem Proofs Practice Worksheets - Free Printable

Educational worksheet: Vertical Angles and Angle Sum Theorem Proofs Practice Worksheets. Download and print for classroom or home learning activities.

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1. Given: ∠1 and ∠2 are vertical angles.
2. ∠1 and ∠3 form a linear pair.
3. ∠2 and ∠3 form a linear pair.
4. m∠1 + m∠3 = 180° (Definition of a linear pair)
5. m∠2 + m∠3 = 180° (Definition of a linear pair)
6. m∠1 + m∠3 = m∠2 + m∠3 (Substitution Property of Equality)
7. m∠1 = m∠2 (Subtraction Property of Equality)
8. ∠1 ≅ ∠2 (Definition of congruent angles)

Parent Tip: Review the logic above to help your child master the concept of beginning geometry proofs worksheet.

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