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Adjacent Angles

Two angles are Adjacent if they have a common side and a common vertex (corner point)

Angle ABC is adjacent to angle CBD

Because:

  • they have a common side (line CB)
  • they have a common vertex (point B)
   

What Is and Isn't Adjacent

These ARE Adjacent Angles

they share a vertex and a side

NOT Adjacent Angles

they only share a vertex, not a side

NOT Adjacent Angles

they only share a side, not a vertex