• Angles and Angle Pairs
• Special Angles
• Lines: Intersecting, Perpendicular, Parallel
• Parallel and Perpendicular Planes
• Points, Lines, and Planes
• Postulates and Theorems
• Segments Midpoints and Rays

• Consequences of the Parallel Postulate
• Testing for Parallel Lines
• Angle Pairs Created with a Transversal
• The Parallel Postulate

• Angle Sum of a Triangle
• Exterior Angle of a Triangle
• Classifying Triangles by Sides or Angles
• Special Names for Sides and Angles
• Altitudes Medians and Angle Bisectors
• Congruent Triangles
• The Triangle Defined
• Special Features of Isosceles Triangles
• Triangle Inequalities: Sides and Angles
• The Triangle Inequality Theorem

• Angle Sum of Polygons
• Special Quadrilaterals
• Proving that Figures Are Parallelograms
• Properties of Special Parallelograms
• Properties of Trapezoids
• Classifying Polygons
• The Midpoint Theorem

• Parallelograms
• Triangles
• Trapezoids
• Regular Polygons
• Circles
• Formulas: Perimeter, Circumference, Area
• Squares and Rectangles

• Properties of Proportions
• Similar Polygons
• Similar Triangles
• Proportional Parts of Triangles
• Proportional Parts of Similar Triangles
• Ratio and Proportion
• Similar Triangles: Perimeters and Areas

• Altitude to the Hypotenuse
• Pythagorean Theorem and Its Converse
• Extension to the Pythagorean Theorem
• Special Right Triangles
• Geometric Mean

• Central Angles and Arcs
• Arcs and Inscribed Angles
• Other Angles
• Arcs and Chords
• Segments of Chords Secants Tangents
• Arc Length and Sectors
• Parts of Circles
• Summary of Relationships

• Right Circular Cylinders
• Pyramids
• Regular Pyramids
• Right Circular Cones
• Spheres
• Prisms
• Right Prisms

• Distance Formula
• Midpoint Formula
• Slope of a Line
• Slopes: Parallel and Perpendicular Lines
• Equations of Lines
• Points and Coordinates
• Summary of Coordinate Geometry Formulas