Answer :

Answer:

∠2 + ∠3 = 90°

Step-by-step explanation:

Since AB and CD are parallel lines, then

∠2 and ∠3 + 90 are same side interior angles and are supplementary, thus

∠2 + ∠3 + 90= 180° ( subtract 90 from both sides )

∠2 + ∠3 = 90°

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