1.
Geometry provides a means for communicating shape and size.
The root meaning of “geometry” is “land (or ‘earth’) measure.”
Van Hiele levels
are a postulated
"series of levels of understanding for a geometry topic .
.. that students must pass through" when learning it.
2. The basic terms of geometry are point, line, plane, and space.
A plane in mathematics has infinite length and width and is flat.
.
In geometry, the set of all possible points
is called “space.”
5.
In a plane, a closed figure with straight sides is called a “polygon.”
In Greek, “poly“+ “gon” = “many” + “angle.”
A “geoboard” is a teaching aid which can be useful
for the study of points, line segments, and polygons
6.
A measurement gives a number and a unit of measure.
Distances are expressed in (plain) units.
The meter was planned to be
1/10,000,000 of the earth’s quadrant.
7.
One meter is about 1 yard long. The orange rod (from Cuisenaire student set) has
length onetenth of a meter, ie, one decimeter.
A centimeter is about the width of an
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 Winter '07
 SteveBlair
 Math, Geometry, Right triangle, Orders of magnitude

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