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TRIGNOMETRY

the sum of the angles of a Triangle is 180°

The birth of a True Equilateral Triangle from Isosceles parents is the subject of rejoicing in our country from many furlongs around.Edwin Abbott Welcome to...

Annotate and Acknowledge – IM CERTIFIED® BLOG

By Jen Hawkins, IM Certified® Facilitator and Independent Curriculum Implementation Specialist As I sat at the table in the back of the room, I watched...

Derivative Problems and Solutions (Part

Problems 1-4 : Find the derivative and give the domain for the derivative.Problem 1 : Solution : https://www.youtube.com/watch?v=ODZU2cfO2bg Problem 2 : Solution : https://www.youtube.com/watch?v=DC3aAHrYOaU Problem 3 :f(x) = |2x +...

Getting Ready for 2024–2025 Back to School with Illustrative Mathematics

By the IM Team Welcome to the 2024–2025 school year! As we gear up for another exciting year of learning and growth, Illustrative Mathematics is...

FREEBIE Algebra Riddle Solving Quadratic Equations by Factoring

Coming to you quickly today to let you know I have a freebie available if you sign up for my email list!I designed this...

Freebie – Number Crossword Puzzle – Number Cruncher

I tried making a new type of crossword puzzle this week - it's great for fast finishers or a brain break.  Perfect for having...

Super Secret Number Puzzles for Math Class

Who doesn't love a good mystery?  But, in math class - let's face it, our students need to practice!So, I have developed an entire...

New Year’s Greetings, 2024 – ThatsMaths

The That’s Maths blog has been active since July 2012. This is post number 600. For the past eleven and a half years, there...

Teaching the Angle Sum Theorem in Triangles

Missing angles in a triangle leads us to the angle sum theorem which states that there are 180˚ in every triangle.  Really???  In EVERY...

How the continuum hypothesis could have been a fundamental axiom, UC Irvine Logic & Philosoph of Science Colloquium, March 2024

This will be a talk for the Logic and Philosophy of Science Colloquium at the University of California at Irvine, 15 March 2024. Abstract....

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