Joanna Witzel
About me: I’m a California Credentialed Math Teacher with 20+ years of experience tutoring Math Students.
Looking for help on tricky topics? Need a how-to or template to solve a certain type of math problem? You’re in the right place.
This channel contains the most frequently asked questions on these Middle School through High School subjects:
Pre-Algebra
Algebra 1
Geometry
Algebra 2
PreCalculus
Trigonometry
Calculus
Plus:
Tips on Creating Study Guides
General Math Review
Shortcuts
Frequently Asked Questions from my students
....and your questions!
Let me know in the Comments section on a video if there’s a math example you’d like to see.
Plus I occasionally post a video about art and sketchbook ideas.
Geometry: Finding the Area of a Regular Polygon
Painting Trees Fast and Loose in Watercolor
Watercolor Fast and Loose: 3-dot Flowers
Sketchbook: Watercolor with Pen and Ink
Triangle in the Coordinate System — Is it a Right Triangle?
Factoring by Grouping
Another Factoring Technique
Finding the Equation of an Ellipse given Vertices and Foci
System of Inequalities: Cubics
System of Inequalities with a Circle
Graphing Inequalities that are not Linear
Graphing an Ellipse — Full Version
Special Right Triangles: 30-60-90 and 45-45-90
Area of the Shaded Region in a Circle
Verifying that Functions are Inverses
Geometry: Finding the Shaded Area
Composition of Functions
Finding the Zeros of a Polynomial
Trig Identity using a Double Angle Formula
Using a Pythagorean Identity to Prove a Trig Identity
Trigonometric Identities — Basics
Probability Coin Toss Questions (and Answers) — and How to use a Tree Diagram
Journal Flip-through
How to Identify Conic Sections by their Equations
Graphing an Ellipse Not Centered at the Origin — Minimalist Version
Completing the Square for an Ellipse or Hyperbola
Rationalizing Denominators
Simplifying Complex Rationals
Absolute Value: Solving Equations and Inequalities
How to Graph a Quadratic