Goals of the Unit
- identify similar figures by comparing corresponding parts
- use scale factors and ratios to describe relationships among the side lengths of similar figures
- construct similar polygons
- draw shapes on coordinate grids and then use coordinate rules to stretch and shrink those shapes
- predict the ways that stretching or shrinking a figure affect lengths, angle measures, perimeters, and areas
- use the properties of similarity to calculate distances and heights that can't be directly measured
Vocabulary
complementary angles rep-tile
corresponding angles scale factor
equivalent ratios similar
image supplementary angles
ratio midpoint
corresponding angles scale factor
equivalent ratios similar
image supplementary angles
ratio midpoint
| stretching_and_shrinking_review.pdf |