This document contains notes from four geometry lessons on similar and congruent figures, scale factors, ratios, and proportions. It includes vocabulary definitions, examples worked out in class, and homework assignments for students to practice the concepts taught each day. The lessons focus on justifying congruency and symmetry of figures and solving problems using scale factors, ratios, and proportions.
1. 3c: Justify congruency and symmetry of two figures (DOK 2)4d: Solve problems involving scale factors using ratios and proportions (DOK 2) By: Deia Sanders
3. Vocabulary Similar: two polygons are similar if the corresponding sides are in the same proportion; if the polygons are similar, the corresponding angles will be equal.
11. Day 3 3c: Justify congruency and symmetry of two figures (DOK 2)4d: Solve problems involving scale factors using ratios and proportions (DOK 2)
12. Letâs Review from yesterday Please exchange papers to check homework for a grade
13. Vocabulary Line of symmetry: a line is a line of symmetry for a figure if the reflection of every point on that figure with respect to the line is also a point of the figure (Where you can fold and object and itâs the exact same on both sides)
18. Day 4 3c: Justify congruency and symmetry of two figures (DOK 2)4d: Solve problems involving scale factors using ratios and proportions (DOK 2)
19. Congruent: if two polygons are congruent, then their corresponding or matching sides and angles are also congruent. Congruent figures are also similar, so the corresponding sides can also be found using ratios. Vocabulary
22. Secret trick The sides and angles of polygons are listed the same order, or order of congruence. You can line up the letters from each figure on top of each other and it will match up the congruent sides and angles.