Geometry

On this page, I will be sharing the geometry content that I have created over the past 23 years of teaching high school geometry. Mostly, this will consist of videos and interactive software files such as The Geometer's Sketchpad and Geogebra. Please feel free to use any of this content for non-profit educational purposes. All content is available on the Henrico County Public School geometry web page.

Video:
Click once on the video and then hover your mouse over the screen to scroll through all the videos. Although this is incomplete, it is my goal to have a video for each lesson of the typical geomety course. See the course outline below.


Geometry Course Outline
note: "SOL" represent Virginia's Standards of Learning

Unit One: Fundamentals
Lesson 1-1: Point, Line, Plane
Lesson 1-2: Segments and Rays
Lesson 1-3: Formulas (SOL G.2)
Lesson 1-4: Angles
Lesson 1-5: Pairs of Angles (SOL G.3)

Unit Two: Perpendicular / Parallel Lines
Lesson 2-1: Conditional Statements (SOL G.1)
Lesson 2-2: Logic (SOL G.1)
Lesson 2-3: Pairs of Lines
Lesson 2-4: Angles and Parallel Lines
Lesson 2-5: Proving Lines Parallel (SOL G.4)

Unit Three: Triangles / Polygons
Lesson 3-1: Triangle Fundamentals
Lesson 3-2: Isosceles Triangles
Lesson 3-3: Triangle Inequalities (SOL G.6)
Lesson 3-4: Polygons (SOL G.9)

Unit Four: Proofs with Triangles
Lesson 4-1: Using Properties
Lesson 4-2: Congruent Triangles (SOL G.5)
Lesson 4-3: Proving Triangles Congruent – SSS, SAS, ASA (SOL G.5)
Lesson 4-4: Proving Triangles Congruent – AAS, HL (SOL G.5)

Unit Five: Similarity
Lesson 5-1: Using Proportions
Lesson 5-2: Exploring Similar Polygons (SOL G.14)
Lesson 5-3: Identifying Similar Triangles (SOL G.5)
Lesson 5-4: Proportional Parts

Unit Six: Quadrilaterals
Lesson 6-1: Parallelograms (SOL G.8)
Lesson 6-2: Tests for Parallelograms
Lesson 6-3: Rectangles (SOL G.8)
Lesson 6-4: Rhombi and Squares (SOL G.8)
Lesson 6-5: Trapezoids and Kites (SOL G.8)

Unit Seven: Right Triangles
Lesson 7-1: Geometric Mean
Lesson 7-2: The Pythagorean Theorem (SOL G.7)
Lesson 7-3: Special Right Triangles (SOL G.7)
Lesson 7-4: Trigonometry (SOL G.7)

Unit Eight: Circles
Lesson 8-1: Terminology
Lesson 8-2: Circumference / Area
Lesson 8-3: Tangents (SOL G.10)
Lesson 8-4: Arcs and Chords (SOL G.10)
Lesson 8-5: Angle Formulas (SOL G.10)
Lesson 8-6: Segment Formulas (SOL G.10)

Unit Nine: Surface Area and Volume
Lesson 9-1: Area of 2-D Shapes
Lesson 9-2: Prisms and Pyramids (SOL G.13)
Lesson 9-3: Cylinders and Cones (SOL G.13)
Lesson 9-4: Spheres (SOL G.13)
Lesson 9-5: Similar Objects (SOL G.14)

Unit Ten: Special SOL Topics
Lesson 10-1: Constructions (SOL G.11)
Lesson 10-2: 3-D Views (SOL G.12)
Lesson 10-3: Perspective Drawing (SOL G.12)
Lesson 10-4: Tessellations (SOL G.9)
Lesson 10-5: Transformations (SOL G.2)