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Geometry (all content) (K-A)

Lines (K-A)

Lines, line segments, and rays (K-A)

Geometric definitions (K-A)

Measuring segments (K-A)

Parallel and perpendicular (K-A)

Points, lines, & planes (K-A)

The golden ratio (K-A)

Angles (K-A)

Angle introduction (K-A)

Angle types (K-A)

Angles between intersecting lines (K-A)

Angles in circles (K-A)

Constructing angles (K-A)

Measuring angles (K-A)

Sal's old angle videos (K-A)

Vertical, complementary, and supplementary angles (K-A)

Shapes (K-A)

Angles with polygons (K-A)

Classifying geometric shapes (K-A)

Curves and polygons (K-A)

Geometric solids (3D shapes) (K-A)

Properties of shapes (K-A)

Triangles (K-A)

Altitudes (K-A)

Angle bisectors (K-A)

Bringing it all together (K-A)

Medians & centroids (K-A)

Perpendicular bisectors (K-A)

Triangle angles (K-A)

Triangle inequality theorem (K-A)

Triangle types (K-A)

Quadrilaterals (K-A)

Quadrilateral proofs & angles (K-A)

Quadrilateral types (K-A)

Coordinate plane (K-A)

Coordinate plane: 4 quadrants (K-A)

Coordinate plane: quadrant 1 (K-A)

Drawing polygons in the coordinate plane (K-A)

Quadrants on the coordinate plane (K-A)

Quadrilateral proofs & angles (K-A)

Quadrilaterals on the coordinate plane (K-A)

Reflecting points on coordinate plane (K-A)

Area and perimeter (K-A)

Advanced area with triangles (K-A)

Area and circumference of circles (K-A)

Area of parallelograms (K-A)

Area of rectangles (K-A)

Area of shapes on grids (K-A)

Area of trapezoids & composite figures (K-A)

Area of triangles (K-A)

Count unit squares to find area (K-A)

Perimeter (K-A)

Volume and surface area (K-A)

Cross sections of 3D objects (K-A)

Heron's formula (K-A)

Koch snowflake fractal (K-A)

Surface and volume density (K-A)

Surface area (K-A)

Volume of cones, cylinders, and spheres (K-A)

Volume of rectangular prisms (K-A)

Volume with fractions (K-A)

Pythagorean theorem (K-A)

Pythagorean theorem (K-A)

Pythagorean theorem and distance between points (K-A)

Pythagorean theorem application (K-A)

Pythagorean theorem proofs (K-A)

Transformations (K-A)

Dilations (K-A)

Introduction to rigid transformations (K-A)

Old transformations videos (K-A)

Properties and definitions of transformations (K-A)

Reflections (K-A)

Rotations (K-A)

Symmetry (K-A)

Translations (K-A)

Congruence (K-A)

Proofs of general theorems that use triangle congruence (K-A)

Theorems concerning quadrilateral properties (K-A)

Theorems concerning triangle properties (K-A)

Transformations and congruence (K-A)

Triangle congruence (K-A)

Working with triangles (K-A)

Similarity (K-A)

Angle bisector theorem (K-A)

Definitions of similarity (K-A)

Introduction to triangle similarity (K-A)

Solving modeling problems with similar and congruent triangles (K-A)

Solving problems with similar and congruent triangles (K-A)

Solving similar triangles (K-A)

Trigonometry (K-A)

Introduction to the trigonometric ratios (K-A)

Modeling with right triangles (K-A)

Sine and cosine of complementary angles (K-A)

Solving for a side in a right triangle using the trigonometric ratios (K-A)

Solving general triangles (K-A)

Special right triangles (K-A)

The law of cosines (K-A)

The law of sines (K-A)

The reciprocal trigonometric ratios (K-A)

Trigonometric ratios and similarity (K-A)

Circles (K-A)

Arc length (from degrees) (K-A)

Arc length (from radians) (K-A)

Arc measure (K-A)

Area of inscribed triangle (K-A)

Circle basics (K-A)

Expanded equation of a circle (K-A)

Inscribed angles (K-A)

Inscribed shapes problem solving (K-A)

Introduction to radians (K-A)

Properties of tangents (K-A)

Sectors (K-A)

Standard equation of a circle (K-A)

Analytic geometry (K-A)

Challenge: Distance between a point and a line (K-A)

Distance and midpoints (K-A)

Dividing line segments (K-A)

Equations of parallel and perpendicular lines (K-A)

Parallel and perpendicular lines on the coordinate plane (K-A)

Problem solving with distance on the coordinate plane (K-A)

Geometric constructions (K-A)

Constructing a line tangent to a circle (K-A)

Constructing bisectors of lines and angles (K-A)

Constructing circumcircles and incircles (K-A)

Constructing regular polygons inscribed in circles (K-A)

Miscellaneous (K-A)

Worked examples (K-A)