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Welcome to CORD Online Resources
For Learning in Context

Learning in Context is an on-line supplement for our math and science textbooks. Each lesson in CORD’s textbooks is supported by a series of links to various websites. These links add new or more in-depth meaning to the lessons taught in the textbook.

You can navigate each book by using the expanding menu at the left or clicking on the chapters below.

Geometry - 3rd Edition

cover of geometry 3rd edition textbook


1.1 Basic Geometric Figures

Chapter 1: Discovering Geometry

Chapter 2: Reasoning and Proof

Chapter 3: Triangle Theorems

Chapter 4: Similar Triangles

Chapter 5: Right Triangles

Chapter 6: Polygons and Quadrilaterals

Chapter 7: Coordinate Geometry

Chapter 8: Perimeter and Area

Chapter 9: Circles

Chapter 10: Surface Area and Volume

Chapter 11: Transformational Geometry