Basic Notions
Angle Measures - degrees, minutes and seconds
Linear Measure
Converting between Inches, Feet, Yards and Miles
Polygons and Symmetry
Reflection Symmetry and Rotational Symmetry
More about Angles (vertical, complementary, supplementary, interior, etc.)
Proof that Vertical Angles are Equal
Complementary and Supplementary Angles
Angles Formed by Parallel Lines and a Transversal
Proof - Sum of Interior Angles of a Triangle
Proof - Exterior Angle Theorem for Triangles
Sum of the Interior Angles of a Polygon
Sum of the Exterior Angles of a Convex Polygon
Congruent Triangles
Triangle Congruence - SSS, SAS, ASA and AAS
Triangle Congruence - why SSA doesn't always work
Geometric Constructions
Basic Geometric Constructions - copying line segments, angles and triangles
Constructing a Perpendicular Bisector of a Line Segment
Constructing a Line Parallel to a Given Point
Properties of Quadrilaterals
Properties of Special Parallelograms - rhombus, rectangle, square
Similarity
Triangle Similarity - SSS, SAS, and AA
The Side Splitter Theorem and its Converse
Dividing a Line Segment into Equal Parts
The Triangle Midsegment Theorem
Medians and Centroid of a Triangle
Similar Triangle Word Problems
Networks