6.6: Chapter 6 Review
Keywords and Theorems
Angles in Polygons
 Polygon Sum Formula
 Equiangular Polygon Formula
 Regular Polygon
 Exterior Angle Sum Theorem
Properties of Parallelograms
 Parallelogram
 Opposite Sides Theorem
 Opposite Angles Theorem
 Consecutive Angles Theorem
 Parallelogram Diagonals Theorem
Proving Quadrilaterals are Parallelograms
 Opposite Sides Theorem Converse
 Opposite Angles Theorem Converse
 Consecutive Angles Theorem Converse
 Parallelogram Diagonals Theorem Converse
 Theorem 610
Rectangles, Rhombuses, and Squares
 Rectangle Theorem
 Rhombus Theorem
 Square Theorem
 Theorem 614
 Theorem 615
 Theorem 616
Trapezoids and Kites
 Trapezoid
 Isosceles Trapezoid
 Theorem 617
 Theorem 617 Converse
 Isosceles Trapezoid Diagonals Theorem
 Midsegment (of a trapezoid)
 Midsegment Theorem
 Kite
 Theorem 621
 Theorem 622
 Kite Diagonals Theorem
Quadrilateral Flow Chart
Fill in the flow chart according to what you know about the quadrilaterals we have learned in this chapter.
Table Summary
Determine if each quadrilateral has the given properties. If so, write yes or state how many sides (or angles) are congruent, parallel, or perpendicular.
Opposite sides 
Diagonals bisect each other 
Diagonals 
Opposite sides 
Opposite angles 
Consecutive Angles add up to 


Trapezoid  
Isosceles Trapezoid  
Kite  
Parallelogram  
Rectangle  
Rhombus  
Square 
 How many degrees are in a:
 triangle
 quadrilateral
 pentagon
 hexagon
 Find the measure of all the lettered angles below. The missing angle in the pentagon (at the bottom of the drawing), is
138∘ .
Texas Instruments Resources
In the CK12 Texas Instruments Geometry FlexBook® resource, there are graphing calculator activities designed to supplement the objectives for some of the lessons in this chapter. See http://www.ck12.org/flexr/chapter/9691.
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