6.5. Parallelogram Classification http://www.ck12.org
6.5 Parallelogram Classification
Here you’ll learn what properties differentiate the three special parallelograms: rhombuses, rectangles, and squares.
What if you were designing a patio for you backyard? You decide to mark it off using your tape measure. Two sides
are21 feetlong and two sides are28 feetlong. Explain how you would only use the tape measure to make your
patio a rectangle. After completing this Concept, you’ll be able to answer this question using properties of special
parallelograms.
Watch This
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/52580CK-12 Foundation: Chapter6ParallelogramClassificationA
Watch the video at this link to learn more about rectangle and square properties.
Follow this link to watch a video about rhombus properties.
Guidance
Rectangles, rhombuses(the plural is also rhombi) andsquaresare all more specific versions of parallelograms.
Rectangle Theorem:A quadrilateral is a rectangle if and only if it has four right (congruent) angles.
Rhombus Theorem:A quadrilateral is a rhombus if and only if it has four congruent sides.