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Unit 3 Math 8
Transformations/Angles Sums
| Term | Definition |
|---|---|
| Transformation | a rule that assigns each point in the plane (or each point in the geometric figure) to another point in the plane. It can be the same point |
| Pre-image | the original geometric image |
| Horizontal line | a line parallel to the x-axis and have equations in the form of y = a constant |
| Vertical line | a line parallel to the y-axis and have equations in the form of x = a constant |
| Rotation | a geometric transformation that involves rotating a figure a certain number of degrees about a fixed point |
| Reflection | a type of transformation that flips a shape in a mirror line (also called a line of reflection) so that each point is the same distance from the mirror line as its reflected point |
| Translation | the shifting of a figure from one place to another without rotating, reflecting or changing its size |
| Rigid Motion | a transformation that moves a shape from one location to another without changing its size or shape, essentially meaning the object is "slide," "flipped," or "rotated" but remains congruent to its original form |
| Triangle | a three sided figure who's interior angles add up to 180 degrees |
| Exterior Angles | the exterior angles of all polygons add up to 360 degrees |
| Isosceles Triangle | a triangle with two sides of equal length |
Created by:
Miss Choinsky
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