Adjacent Angles
Angles on opposite sides of a common arm are called adjacent angles.
AD is the common arm.
Adjacent Angles
Play around with the angles by dragging the blue dots. Move each dot at least once.
Adjacent Angles
What do you notice about the angles?
If <BAD is 40° and <BAC is 120°, what is <DAC?
What does adjacent mean?
If you have a pair of adjacent angles, what must be true?