Theme 1 Congruence, Proof, and Constructions
1. Foundations for Geometry
2. Extending Transformational Geometry
3. Geometric Reasoning
4. Parallel and Perpendicular Lines
Geometry Textbook Cover
5. Triangle Congruence
6. Properties and Attributes of Triangles
7. Polygons and Quadrilaterals
Theme 2 Similarity, Proof, and Trigonometry
8. Similarity
9. Right Triangles and Trigonometry 
Theme 3 Extending to Three Dimensions
10. Extending Perimeter, Circumference, and Area; Spatial Reasoning
Theme 4 Connecting Algebra and Geometry through Coordinates
*Integrated throughout the Geometry units 
Theme 5 Circles With and Without Coordinates
11. Circles

Each unit above has a link to a high school Geometry newsletter that contains additional information and resources. For newsletters for middle school Geometry, visit Geometry GT 8.

The Year at a Glance provides an overview of the mathematics content taught in the course.

Instructional time should focus on

  • forming, analyzing, testing and applying geometric conjectures;
  • applying geometric transformations to build understanding of congruence, similarity, and symmetry;
  • developing deductive and inductive reasoning skills through proof; and
  • extending the study of two- and three- dimensional analysis of plane and space figures using postulates, theorems, and corollaries.