mixsonmichael2639 mixsonmichael2639 22-02-2024 Mathematics contestada Given: Parallelogram abcd with angles labeled. Prove: ∠1 ≅ ∠4, ∠2 ≅ ∠3, m∠1 + m∠4 = 180°, m∠2 + m∠3 = 180°.