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28 Cards in this Set
- Front
- Back
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translation |
a function that moves an object a certain distance. |
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reflection |
a transformation that creates a mirror image. |
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dilation |
A transformation in which a figure grows larger. |
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rotation |
A transformation in which a plane figure turns around a fixed center point. |
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isometry |
A transformation that is invariant with respect to distance. |
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scale factor |
The ratio of any two corresponding lengths in two similar geometric figures. |
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point |
An exact location. It has no size, only position. |
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line |
a transformation that turns a figure about a fixed point. |
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segment
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a part of a straight line bounded by two points.
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plane
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A flat surface that is infinitely large and with zero thickness |
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collinear |
Passing through or lying on the same straight line. |
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coplanar |
Lying or occurring in the same plane. Used of points, lines, or figures. |
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ray |
A line which starts at a point with given coordinates, and goes off in a particular direction to |
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segment addition postulate |
given 2 points A and C, a third point B lies on the line segment AC if and only if the distances between the points satisfy the equation AB + BC = AC. |
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midpoint |
the exact middle point. |
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perpendicular bisector |
a line segment is a line segment perpendicular to and passing through the midpoint of |
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angle |
the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet. |
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angle bisector |
the angle bisector theorem is concerned with the relative lengths of the two segments that a triangle's side is divided into by a line that bisects the opposite angle. |
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adjacent angles |
Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap. |
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vertical angles |
each of the pairs of opposite angles made by two intersecting lines. |
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linear pair |
A linear pair of angles is formed when two lines intersect. |
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angle addition postulate |
If point B lies in the interior of angle AOC, then. . The postulate describes that putting two angles sides-by-side with their vertices together creates a new angle whose measure equals the sum of the measures of the two original angles. |
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complementary |
Two Angles are Complementary when they add up to 90 degrees (a Right Angle). They don't have to be next to each other, just so long as the total is 90 degrees. |
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supplementary |
Two Angles are Supplementary when they add up to 180 degrees. They don't have to be next to each other, just so long as the total is 180 degrees. |
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same side interior angles |
two angles that are on the same side of the transversal and on the interior of (between) the two lines. |
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alternate interior angles |
Alternate interior angles are formed when a transversal passes through two lines. The angles that are formed on opposite sides of the transversal and inside the two lines are alternate interior angles. |
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alternate exterior angles |
When two lines are crossed by another line (called the Transversal): The pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles. |
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corresponding angles |
the angles that occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal. |
