Respuesta :

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Two Angles are Supplementary when they add up to 180°.

∠1 and ∠4

∠4 and ∠5

∠6 and ∠7

Other:

∠2 and ∠3

∠1 and ∠8

∠8 and ∠5

Answer:

B, D, and E.

Step-by-step explanation:

∠3 and ∠6

∠1 and ∠4

∠5 and ∠6

∠4 and ∠5

∠6 and ∠7