STEM

# Basic Principles of Geometry

146 CQ
35 Lessons
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5 CQ
21. The Concept of Collinearity
A lesson with Math Fortress

This lesson introduces the mathematical concept of collinearity. Understand the definition of collinearity and learn about how it applies to geometry.

This lesson introduces the mathematical concept of collinearity. Understand the definition of collinearity and learn about how it applies to geometry.

• Playing
4 CQ
22. Five Examples of Collinearity
A lesson with Math Fortress

In this lesson, follow along to five examples that illustrate how to use the math concepts of collinearity and betweenness of points in various applications.

In this lesson, follow along to five examples that illustrate how to use the math concepts of collinearity and betweenness of points in various applications.

• Playing
4 CQ
A lesson with Math Fortress

In this lesson, follow along and solve three slightly more challenging examples illustrating how to use the concepts of collinearity and triangle inequality.

In this lesson, follow along and solve three slightly more challenging examples illustrating how to use the concepts of collinearity and triangle inequality.

• Playing
5 CQ
24. Collinearity & Angles
A lesson with Math Fortress

In this final lesson, follow along to solve four example problems that involve angle measurements. Use information from diagrams to solve these problems.

In this final lesson, follow along to solve four example problems that involve angle measurements. Use information from diagrams to solve these problems.

• Playing
5 CQ
25. Beginning Proofs | Part 1
A lesson with Math Fortress

This lesson explains the basics of how to write two-column algebraic and geometric proofs. It also covers the elements of an axiomatic system. Let's dig in!

This lesson explains the basics of how to write two-column algebraic and geometric proofs. It also covers the elements of an axiomatic system. Let's dig in!

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