1. Section 9.1 Points, Lines, Planes Point Segment Ray Line Plane Parallel Perpendicular Skew Intersecting Lines

2. Drawing & Measuring Angles Angle Vertex Acute Angle Right Angle Obtuse Angle Straight Angle Congruent Angles Complementary Angles Supplementary Angles

3. Section 9.2 Angles Transversal Adjacent Angles Vertical Angles Corresponding Angles Alternate Interior Angles *Alternate Exterior Angles

4. Section 9.3 Triangles Polygon Acute Triangle Right Triangle Obtuse Triangle Equilateral Triangle Isosceles Triangle Scalene Triangle

5. Section 9.3 Quadrilaterals Regular Polygon Quadrilateral Square Rectangle Parallelogram Rhombus Trapezoid

6. Section 9.5 Congruence Congruent Figures Side Side Side Side Angle Side Angle Side Angle

7. Section 9.6 Circles Circle Radius Diameter Circumference Chord Central Angle Arc Semicircle