Question

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Answer 1

Answer:

• x = 9°
• 8x = 72°
• 12x = 108°

Step-by-step explanation:

Where a transversal crosses parallel lines, consecutive exterior angles are supplementary:

  8x +12x = 180°

  20x = 180° . . . . . . . collect terms

 x = 9° . . . . . . . . . divide by 20

  8x = 8(9°) = 72°

  12x = 12(9°) = 108°