Respuesta :

sqdancefan

Answer:

  ∠CBD = 55°

Step-by-step explanation:

With respect to ΔBCD, angle BDA is an exterior angle. As such, its value is the sum of remote interior angles CBD and BCD:

  80° = ∠CBD +25°

  ∠CBD = 55° . . . . . . subtract 25° from both sides