Angle- figure formed by two rays with a common endpoint
Vertex- the common endpoint of the two rays that form an angle
Sides- The two rays that form an angle
Adjacent Angles- two angles with 1.) A common vertex 2.) A common side 3.) No common interior points
Linear Pair- two adjacent angles whose nonshared side form a pair of opposite rays.
Vertical Angles- a pair of nonadjacent angles formed by intersecting lines.
Acute- measure less than 90º
Right- equals 90º
Obtuse- greater than 90º
Straight- equals 180º (formed by opposite rays)