Chapter 7 Section 7.1: Geometry Essential Ideas Homework Hints Individual Research Projects Links History Links Reference Topic Links Section 7.2: Polygons and Angles Essential Ideas Homework Hints Links Video Links History Links Reference Topic Links Section 7.3: Triangles Essential Ideas Homework Hints Links History Links Reference Topic Links Section 7.4: Similar Triangles Essential Ideas Homework Hints Links Video Links History Links Reference Topic Links Section 7.5: Right-Triangle Trigonometry Essential Ideas Homework Hints Individual Research Projects Links Video Links History Links Reference Topic Links Section 7.6: Mathematics, Art, and Non-Euclidean Geometries Essential Ideas Homework Hints Individual Research Projects Links Video Links History Links Section 7.7: Review for Chapter 7