Term
| one to one correspondence |
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Definition
| a relationship between two sets in which a member of one set is matched exactly with a member of the other set |
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| one to one correspondence between two sets of points |
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| transformation in which each point of the figure moves the same distance in the same direction |
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| figure before a translation |
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Definition
| figure after a translation |
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Definition
| through a degrees about O is a transformation such that it maps P->P'. if P is different from O the OP=OP' and POP'=a degrees. if P is O the P' is P. |
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Term
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Definition
| in a line L is a transformation such that it maps P->P' such that P and P' are the same distance (opposite sides) from L. if P is not on L then L is the perpendicular bisector of PP'. if P is on L then P' is P. |
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Definition
| a transformation that preserves distance and angle measure (figures are congruent) |
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| an enlarging or reducing of a figure |
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| a composition of a translation and a reflection in a line parallel to the direction of translation |
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| a figure has rotational symmetry with respect to a point iff it coincides with its rotational image through less than 360 degrees (figure looks same when turned) |
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Term
| reflectional or line symmetry |
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Definition
| a plane figure has reflectional symmetry iff you can divide it along a line into two parts that are mirror images |
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Definition
| a pattern has translational symmetry iff it coincides with its translational images (repeated pattern) |
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Definition
| union of a polygon and its interior |
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Definition
| a segment from a vertex perpendicular to the line that contains the opposite side |
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Term
| altitude of a quadrilateral with parallel bases |
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Definition
| the length of the perpendicular segment of the lines containing the two parallel sides |
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