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Geometry

When Classifying Triangles, we look at angle measurements to identify Acute Triangles, or compare side lengths to recognize Scalene Triangles. Geometry integrates equations from many different topics and concepts such as the Circumcenter of a Triangle and the Three Point Principle. Mathematics isn't just about equations, it is about strengthening your critical thinking muscles by learning how to identify, compare and contrast Triangle Relationships. Triangle Notation, Orthocenter of a Triangle, and Triangle Angle Combinations are other areas of expertise that you will find here.

- Introduction to Triangles
- Three Point Principle
- Triangle Notation
- Sides of a Triangle
- Determining Whether a Group of Sides Can Form a Triangle
- Medians of a Triangle
- Centroid of a Triangle
- Altitudes of a Triangle
- Orthocenter of a Triangle
- The Incenter of a Triangle
- Circumcenter of a Triangle
- The Angles of a Triangle
- Angles and Sides of a Triangle
- Determining the Largest Angle of a Triangle
- Determining the Longest Side of a Triangle
- Classifying Triangles
- Triangle Angle Combinations
- Acute Triangles
- Obtuse Triangles
- Isosceles Triangles
- Equilateral Triangles
- Scalene Triangles
- Scalene, Isosceles, and Equilateral Triangles
- Solving for an Angle of a Triangle
- Triangle Interior Angles Practice
- Isosceles Triangle Base Angles Theorem
- Isosceles Triangle Base Angles Theorem Converse
- Solve for an Angle of an Isosceles Triangle
- Solving for an Angle of an Equilateral Triangle
- Equilateral Triangle Interior Angles Practice Problems
- Triangle Exterior Angles Theorem
- Triangle Exterior Angles Practice

Study fundamental topics in college-level algebra with emphasis on application.

Grasp core concepts of statistics such as probability distributions, approximations, and hypothesis-testing.

Pathways are a sequence of tutorials that help you learn a whole subject area, one concept at a time. Choose from multiple teachers and teaching styles.

The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 25 of Sophia's online courses for college credit. These courses are eligible to transfer to many different colleges and universities.