CK-12 Geometry-Concepts

6.8. Quadrilateral Classification http://www.ck12.org

2. A square is a parallelogram.


3. An isosceles trapezoid is a quadrilateral.


4. A rhombus is a square.


5. A parallelogram is a square.


6. A square is a kite.


7. A square is a rectangle.


8. A quadrilateral is a rhombus.

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.

TABLE6.10:

Opposite

sides ||

Diagonals

bisect each

other

Diagonals⊥ Opposite

sides∼=

Opposite an-

gles∼=

Consecutive

Angles add

up to 180 ◦

Trapezoid

Isosceles

Trapezoid

Kite

Parallelogram

Rectangle

Rhombus

Square

Find the measure of all the lettered angles below. The bottom angle in the pentagon (at the bottom of the drawing)
is 138◦.

Texas Instruments Resources

In the CK-12 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.