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Unit 1 Grade 8 Open up Resources

Terms in this set (11)

Clockwise
An object rotating in the same ways as a clocks hands.
Counter Clockwise
An object rotation in the opposite direction of the hands of a clock.
Congruent
One figure is congruent to another if there is a rigid transformation (A sequence of translations, rotations, and reflections) that moves the first figure so that it fits exactly over the senod. The second figure is called the image of the rigid transformation.
Corresponding
If one figure is congruent to another figure then they must have corresponding parts. These are things both figures have in common like angles points or sides
Reflection
A reflection of a figure is when you reflect ever point of the figure across a line.
When writing about a reflect you include
A line of reflection
A order of sequence
Rigid Transformation
A rigid transformation is a sequence of translations, rotations, and reflections.
Rotation
A rotation is when you turn a figure.
When writing about a rotation include
A center (a point on the figure you're going to turn from)
An angle measurement your turning an object
A direction (clockwise or counterclockwise)
Sequence of Transformations
A set of Translations, rotations,reflections, and dilations performed in a particular order.
Transformation
A translation, rotation, reflection, or dilation, or combination of these.
Translation
A distance and direction moving every point in a figure.
When writing about a Translation include
A direction (right or left)
Distance of units
Vertical Angles
A pair of angles that are across from each other at the point where the 2 lines intersect.
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