4npkgd999i 4npkgd999i
  • 21-04-2021
  • Mathematics
contestada

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

In the diagram mBDA 150 Find mBDC class=

Respuesta :

reeserl reeserl
  • 22-04-2021

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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