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Liono4ka [1.6K]
3 years ago
13

In this diagram, m DCB = ???​

Mathematics
1 answer:
Elza [17]3 years ago
7 0

Answer:

  56°

Step-by-step explanation:

The two marked angles are supplementary, so total 180°.

  (2x +8) +(x -2) = 180

  3x +6 = 180 . . . . . . . . . . collect terms

  x + 2 = 60 . . . . . . . . . . . divide by 3

  x = 58 . . . . . . . . . . . . . . subtract 2

∠DCB = x-2 = 58 -2

∠DCB = 56

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