CK12 - Geometry

(Marvins-Underground-K-12) #1

Apparentlysomeregularpolygonswill tessellateand somewon’t.You can explorethis morein the Lesson
Exercises.


Tessellatingwith Two RegularPolygons


You saw that someregularpolygonscan tessellateby themselves.If we relaxour requirementsand allow
two regularpolygons,moretessellationscan be drawn.


Example 3


Hereis a tessellationmadefrom squaresand regularoctagons.


Note the measuresof the angleswheretwo octagonsand a squarecometogetherto surrounda point.They


are and and


One way to look at this tessellationis as a translation.Eachoctagonis repeatedlytranslatedto the right
and down.Or the tessellationcouldbe seenas a reflection.Reflecteachoctagonin its verticaland horizontal
edges.The tessellationcan evenbe viewedas a glidereflection.Translatean octagonto the right,then
reflectit vertically.


A tessellationbasedon morethan one regularpolygonis calledasemi-regulartessellation. One semi-reg-
ular tessellationis shownin the example3. You’ll havethe opportunityto createothersin the LessonExer-
cises.


TessellationDIY (“DoIt Yourself”)


All peoplecan createtheir own tessellations.Hereis an example.

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