Given: 21 and 22 are complements,
22 and 23 are complements, and mz1 = 35°.
Prove: mz3 = 35°

Step-by-step explanation:

m∠1 = 35°

m∠1 +m∠2 = 90°    {The two angles are compliments}

35 + m∠2  = 90°

          m∠2 = 90 - 35

         m∠2 = 55°

m∠2 + m∠3 = 90°      {The two angles are compliments}

55 + m∠3 = 90°

       m∠3 = 90° - 55°

m∠3 = 35°

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