Geometry Theorems
Master essential triangle and circle theorems for geometric proofs and SAT/ACT success.
What You'll Learn
- Apply the Triangle Angle Sum Theorem and Exterior Angle Theorem
- Use the Isosceles Triangle Theorem to find unknown angles
- Understand the relationship between inscribed and central angles
- Solve word problems involving triangle and circle theorems
- Identify and avoid common mistakes on geometry problems
- Demonstrate mastery through a comprehensive unit assessment
SAT/ACT Alignment
SAT Math Domain: Geometry and Trigonometry - Triangle and circle theorem questions appear frequently, testing your ability to apply properties and solve for unknown angles.
ACT Math: Geometry questions make up approximately 23% of the ACT Math section, with theorems being a core component.
Lessons
Triangle Theorems
Learn the Triangle Angle Sum, Exterior Angle, and Isosceles Triangle Theorems.
Circle Theorems
Master inscribed angles, central angles, and arc relationships.
Guided Practice
Step-by-step practice with worked examples and solution strategies.
Word Problems
Apply theorems to real-world scenarios and SAT/ACT style problems.
Common Mistakes
Identify and avoid frequent errors that cost points on tests.
Unit Quiz
Comprehensive assessment covering all geometry theorem skills.