Grieser, Andrea - Math and Coding / Geometry Videos

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Geometry How-To Videos

"Live as if you were to die tomorrow. Learn as if you were to live forever." --Mahatma Gandhi

Can't remember how to do a certain skill? Check this page to see if a how-to video has been created, and then view it.

Logic

Argument Sketch

Logic Day 1: Inductive Reasoning (9/4/2014)

Logic Day 2: Conditional Statements (9/8/2014)

Logic Day 3: Deductive Reasoning/Euler Diagrams (9/10/2014)

Geometry Basics (9/12/2014)

Midpoint/Distance

Midpoint and Distance (9/16/2014)

Angles

Angle Basics and Pairs (9/18/2014)

Proofs

Postulates, Diagrams, and Intro to Proofs (9/26/2014)

Proofs Part 1: Segment and Angle Proofs (9/30/2014)

Proofs Part 2: Angle Pair Proofs (10/2/2014)

Parallel/Perpendicular Lines

Introduction to Parallel Lines (10/6/2014)

Parallel Lines and Transversals (10/8/2014)

Proving Lines Parallel/Slope (10/10/2014)

Write Equations of Parallel/Perpendicular Lines; Theorems; Distance between Lines (last year)

Constructions

Constructions Class Lesson (10/27/2014)

Math Open Ref Construction Animations

Triangles

Triangle Basics, Triangle Sum Theorem, Exterior Angle Theorem (10/15/2014)

Triangle Inequalities (10/17/2014)

Triangle Congruence: SSS, SAS, HL (11/10/2014)

Triangle Congruence: ASA, AAS, CPCTC (11/12/2014)

Isosceles and Equilateral Triangles (11/14/2014)

Triangle Segments (11/18/2014)

Ratios, Proportion, and Geometric Mean (11/20/2014)

Similar Triangles (11/24/2014)

Proportionality Theorems (12/1/2014)

Right Triangles

Pythagorean Theorem (12/9/2014)

Similar and Special Right Triangles (12/11/2014)

Right Triangle Trigonometry (part 1) (12/15/2014)

Trigonometry Part 2 (Angle of Elevation/Depression) and Inverse Trig (12/17/2014)

Polygons and Quadrilaterals

Polygons and Polygon Angles (1/22/2015)

Parallelograms (1/28/2015)

Rhombuses, Rectangles, Squares, Trapezoids, Kites (2/2/2015)

Identifying Quadrilaterals (2/4/2014)

Other Quadrilaterals, and Identifying Quadrilaterals (last year)

Circles

Factoring Review (2/12/2015)

Circle Introduction/Tangents (2/12/2015)

Circle Arcs and Chords (2/19/2015)

Circle Angle Relationships (2/23/2015)

Circle Segments (2/25/2015)

Circle Segments / Arc Lengths (3/9/2015)

Equations of Circles (3/3/2015)

Arc Length/Sector Area "Quick" Lesson (3/10/2015)

Factoring Review and Circle Introduction/Tangents (last year)

Fast Math: Circle Theorems 1 (Inscribed and Central Angles) (2018)

Fast Math: Circle Theorems 2 (Arc and Angle Measures from Intersecting Chords) (2018)

Fast Math: Circle Theorems 3 (Circle Segment Theorems) (2018)

Polygons / 3D Figures

Area of Polygons / Similar Polygon Ratios (3/19/2015)

Polyhedra, Cylinders, and Cones: Surface Area and Volume (3/23/2015)

Spheres and Similar Solids (3/25/2015)

Transformations

Translations (4/14/2015)

Reflections, Rotations, Dilations (4/16/2015)

Symmetry (4/20/2015)

Constructions

Constructions Class Lesson

RegentsPrep Constructions Videos (click on links for construction type to get to videos)

Post SOL - Algebra 2 Preview!

Quadratics Review / Equations in Vertex Form (5/13/2015)

Graphing Using Transformations (5/15/2015)

Absolute Value Equations and Inequalities (5/20/2015)

Logarithms Part 1 (Intro, Expanding/Condensing, Change of Base) (5/27/2015)

Logarithms Part 2 (Solving Exponential Equations) (5/29/2015)

Last Modified on March 2, 2018

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