Students research the language of geometry. All the important geometry vocabulary needed to understand and solve geometry angle problems. Line, Point, Ray, Line Segment, Perpendicular, Parallel, intersecting, Angle, Straight, Acute, Obtuse, Reflect, Right, Scalene, Isosceles, Equilateral, Complementary, Supplementary, Opposite, Transversal, Corresponding, Co-interior, Alternate.