Unit 1:  Introduction to Geometry

Mrs. Razor's Videos and Pictures

Lesson 1.6:  Angle Pairs and Relationships

Lesson 1.5:  Angles and Their Measures

Lesson 1.4:  Segment Addition Postulate and Bisectors

Lesson 1.3:  Points, Lines, & Planes

Lesson 1.2:  Area & Perimeter

Lesson 1.1:  Distance and Midpoint Formulas

Other Videos & Links

Lesson 1.6:  Angle Pairs and Relationships

Introduction to vertical angles: Figuring out angles at the intersection of two lines

Using algebra to find the measures of vertical angles:

Vertical, adjacent and linearly paired angles:

Lesson 1.4:  Segment Addition Postulate and Bisectors

Segment addition:

Algebraic midpoint of a segment exercise:

Lesson 1.3:  Points, Lines, & Planes

Language and Notation of Basic Geometry: Understanding basic ideas in geometry and how we represent them with symbols

Lines, Line Segments, and Rays: Difference between lines, line segments, and rays

Specifying planes in three dimensions:

Lesson 1.2:  Area & Perimeter

Perimeter and Area Basics:

Lesson 1.1:  Distance and Midpoint Formulas

Distance Formula: How to find the distance between lines using the Pythagorean Formula

Midpoint formula: Midpoint Formula