(page 9)
Summary
Have students demonstrate to the class their understanding
of shapes that tessellate, using mathematical vocabulary to
describe both the shape used and the type of transformation
in a work of art or an image from nature. Demonstrate a shape
that will not tessellate. Discuss the properties of the shape
that keep it from tessellating.
Extensions/Interdisciplinary:
Explore examples of geometric shapes that will tessellate:
Cool Math: Tessellations http://www.coolmath.com/tesspag1.htm
Research and use programs on the Internet that create computerized
versions of tessellations:
Tessellation Town
http://www.mathcats.com/explore/tessellationtown.html
Tesselmania Demo Download
http://www.kidsdomain.com/down/mac/tessel.html
Tessellate!
http://www.shodor.org/interactivate/activities/tessellate/index.html
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Lesson Vocabulary:
Congruent: having the same size and shape.
Equilateral triangle: a triangle with three congruent
sides
Isosceles triangle: a triangle with two congruent
sides or two congruent angles
Scalene triangle: a triangle with no congruent sides
or angles
Rhombus: a quadrilateral with four congruent sides.
Parallelogram: a quadrilateral with opposite sides
parallel.
Rectangle: a quadrilateral with four congruent angles,
each 90 degrees.
Square: an equilateral rectangle, four equal sides.
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