Unit 5 Vocabulary. Pre-image . The original figure before undergoing a transformation. Image . The new, resulting figure after a transformation. Isometry. A transformation in which the preimage and image are congruent.
The original figure before undergoing a transformation.
The new, resulting figure after a transformation
A transformation in which the preimage and image are congruent.
Transformations are called RIGID if every image is congruent to its preimage.
Rigid transformations can also be referred to as an ISOMETRY.
Every segment is congruent to its image.
this picture was drawn?
(Slide your image over)
(Flip your image over)
(Turn your image about a fixed point )
preserve lengths, but
they preserve angle measures
parallel lines, and
betweenness of points
Figures are congruent if they have the same shape, size, lines, and angles.
Triangles are similar if they have the same shape but have different sizes.
Corresponding angles are congruent and corresponding sides are proportional
Trapezoids ABCD and EFGH are similar
ABCD ~ EFGH
List all congruent angles
Write the statement of proportionality
NOTE: You must check for corresponding angles to be the same and for the sides to be proportional.