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masha68 [24]
3 years ago
8

In square ABCD, diagonal DB is drawn. If the m

Mathematics
1 answer:
pshichka [43]3 years ago
6 0

9514 1404 393

Answer:

  x = 11

Step-by-step explanation:

The diagonal creates two isosceles right triangles, so ...

  m∠CBD = 45°

  3x +12 = 45

  3x = 33 . . . . . . subtract 12

  x = 11 . . . . . . . . divide by 3

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