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Geometry Ch 9
Stepp's Prentice Hall Geometry Chapter 9 Transformations (sec. 1-5 only)
| Question | Answer |
|---|---|
| A(n) ____ is a change in position, shape, or size of a figure | transformation |
| A ____ is a transformation in which all points in a figure move the same distance & direction | translation |
| A(n) ___ is a transformation in which the preimage and its image are congruent | isometry |
| Another word for reflection is ___ | flip |
| To describe a rotation, you need to know the ___ and the ___ | center, angle of rotation |
| Figures can have reflectional or rotational ___ | symmetry |
| Which type of transformation results in a similar figure? | dilation |
| A scale factor must be ____ | greater than zero |
| Scale factors between 0 and 1 result in a ___ | reduction |
| Enlargements occur when the scale factor is ___ | bigger than one |
| To rotate dilate a figure, begin by drawing the line connecting a point to the ____ | center |
| (x,y) (x +3, y – 6) is an example of a rule for a ___ | translation |
| A ___ is always counterclockwise unless otherwise stated | rotation |
| If half of a figure could be folded to fit exactly over the other half, it has ___ | symmetry |
| If the center for a transformation is not named, it is assume to be ___ | (0,0) |
| Which transformations do not have a center?___ | translations, reflections |
| an image and its preimage are ___ from the center of a rotation | equidistant |
| How do you indicate the translation: move point 4 spaces to the left and three spaces up | (x-4,y +3) |
| y=x is a line that passes thur the ___ and has a slope of ___ | origin, one |
| y=4 is a ___line that passes thru (0,4) | flat |
| x = 2 is a vertical line that passes thru__ | (2,0) |
| An image of a point, and its preimage are equidistant from the line of ____ | reflection |
| The line of reflection is the ___ ___ of the line connecting any point and its preimage | perpendicular bisector |
| In a translation, a figure will fit exactly on top of its ___ | image |
| In a rotation, the image and preimage are ___ | congruent |
| In a dilation the image and preimage are congruent (true or false) | false - they are similar |
| In a dilation, the image is always on the line connecting the center and the ____ | preimage |
| If the scale factor is 3, and the distance to the image is 12, how far is it from the center to the preimage? __ | 4 |
| If the scale factor is 2 and the distance from the center to the preimage is 6, how far is it from the center to the image? | 12 |
| the distance from the image to the center divided by the distance from the peimage to the center = ___ | scale factor |
| We skipped the lessons on ___ and ___ | composite transformations and tesselatons |
| If you have two consecutive rules to follow in order to make a translation, you could simplify by ___ | combining them into one rule by adding |
Created by:
criswell216
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