Big Ideas

1. Measurement

   Essential Question How can you find the sum of the measures of polygon angles?

2. Reasoning and Proof

   Essential Question How can you classify quadrilaterals?

3. Coordinate Geometry

   Essential Question How can you use coordinate geometry to prove general relationships?

Chapter Preview

• 6-1 The Polygon Angle-Sum Theorems
• 6-2 Properties of Parallelograms
• 6-3 Proving That a Quadrilateral Is a Parallelogram
• 6-4 Properties of Rhombuses, Rectangles, and Squares
• 6-5 Conditions for Rhombuses, Rectangles, and Squares
• 6-6 Trapezoids and Kites
• 6-7 Polygons in the Coordinate Plane
• 6-8 Applying Coordinate Geometry
• 6-9 Proofs Using Coordinate Geometry

Table of Contents