1. Section 6.6 Polygons in the Coordinate Plane
OBJECTIVE:
To classify polygons in the coordinate plane
BIG IDEA: Coordinate Geometry
ESSENTIAL UNDERSTANDING:
The formulas for slope, distance and midpoint can be used to classify and to prove geometric relationships for figures in the coordinate plane.
MATHEMATICAL PRACTICE:
Make sense of problems and persevere in solving them

2. Concept Summary Relationships among Quadrilaterals
SEVEN SPECIAL TYPES OF QUADRILATERALS: each shape has all the properties of the shapes linked above it

3. Formulas and the Coordinate Plane
When to Use it
Distance Formula
To determine whether:
Sides are congruent
Diagonals are congruent
Midpoint Formula
To determine:
The coordinates of the midpoint of a side
Whether diagonals bisect each other
Slope Formula
Opposite sides are parallel
Diagonals are perpendicular
Sides are perpendicular

4. EX: What kind of quadrilateral is ?1.

5. EX: What kind of quadrilateral is ?2.