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Zinaida [17]
3 years ago
12

In the diagram, mBDA = 150°. Find mBDC.

Mathematics
1 answer:
Dafna1 [17]3 years ago
6 0

Answer:

a.  70°

Step-by-step explanation:

m∠BDC + m∠CDA = m∠BDA

-3x + 34 - 2x + 56 = 150

-5x + 90 = 150

-5x = 60

x = -12

m∠BDC = -3x + 34 = -3(-12) + 34

              = 36 + 34 = 70°

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