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VikaD [51]
3 years ago
15

I need help I don't understand this.

Mathematics
1 answer:
sergiy2304 [10]3 years ago
5 0

9514 1404 393

Answer:

  ∠4 = 108°

Step-by-step explanation:

Angles 2 and 4 together form a "linear pair". That is, the sum of them is 180°, a "straight angle." They are supplementary.

  ∠4 = 180° -∠2 = 180° -72°

  ∠4 = 108°

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