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Diana Vides

on 3 May 2010

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Transcript of Geometry

Transformation vocabulary transformation http://www.hstutorials.net/math/geometry/definitions/transformation.htm
Takes the original figure and alters it. Example: reflection "mirror symmetry", a figure that is flipped across a line. http://www.mathsisfun.com/geometry/reflection.html Example: Isometry http://www.icoachmath.com/sitemap/problemslink.aspx?Search=isometrygrade=0 reflection or a composite of reflections Translation In easy term, translation means moving. http://www.mathsisfun.com/geometry/translation.html rotational symmetry http://www.icteachers.co.uk/children/sats/rotational.htm Rotation Turning around a center. Center of rotation http://www.mathsisfun.com/geometry/rotation.html Point in which the figure rotates around. LIne of reflection Line which reflected figure makes it transformation over. If reflected properly, each figure should share the distance of the original point from the line of reflection. http://www.mathopenref.com/reflectline.html LIne of Symmetry Line that figures on a plane have if
they can be reflected onto themselves.
Divides a figure into two halves, which
are congruent and mirror images. Angle of rotation Measure of degrees that a figure is rotated about a fixed point. Angle form when lines are drawn from the center of rotation. Vector Line that has both direction and magnitude, and is drawn as an arrow between two points. Has volume, hence "vector" instead of "sector". Initial Point Point on a line that is before
the rest of the points on the line,
which extend in front of the
initial point. Image The figure that you see once
the initial figure has made a
transformation on a plane Preimage Initial figure before figure makes a transformation on a plane Terminal point The ending point of a vector
component form The form of a vector that combines a horizontal and veritcal compontes of the vector. Glide Reflection The combination of a reflection in a line and a translation along that line. http://images.google.com/imgres?imgurl=http://www.sci.uidaho.edu/gadele/TRANSF24.gif&imgrefurl=http://www.sci.uidaho.edu/gadele/TRANSFORMATIONAL%2520GEOMETRY.htm&usg=__cjJVNiMrNjF4sC8lfUMNZ7-GEYE=&h=316&w=293&sz=4&hl=en&start=3&sig2=d80F_e12pn0a_qxcbUB-OA&um=1&itbs=1&tbnid=5SzBa_B_JILxuM:&tbnh=117&tbnw=108&prev=/images%3Fq%3Dgeometry%2Bglide%2Breflection%26um%3D1%26hl%3Den%26sa%3DN%26rlz%3D1G1GGLQ_ENUS345%26tbs%3Disch:1&ei=mxTfS8ORGoOclgf7mNjrBA Composition The result of two or more transformation combining to create a single transformation. Frieze Pattern A pattern that extends to the left and right in such a way that the pattern
can be mapped onto itself by a horizontal translation Dilation Type of transformation that makes everything bigger. scale factor Ratio of the length of the lengths of two
corresponding sides of two similar polygons.
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