# Q2, W7: January 5 – 8 Geometry

Teacher Kristin Andreason Geometry Honors 8 January 5-8 Unit 3: Similarity
Standard(s) Taught

MAFS. 912.G-SRT.1.2:  Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

MAFS.912.G-SRT.1.3:  Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.

MAFS.912.G-SRT.2.5: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

Learning Targets and Learning Criteria
• define similarity as a composition of rigid motions followed by dilations in which angle measure is preserved and side length is proportional.
• identify corresponding sides and corresponding angles of similar triangles.
• demonstrate that in a pair of similar triangles, corresponding angles are congruent (angle measure is preserved) and corresponding sides are proportional.
• determine that two figures are similar by verifying that angle measure is preserved and corresponding sides are proportional.
• show and explain that when two angle measures are known (AA), the third angle measure is also known (Third Angle Theorem).
• conclude and explain that AA, SSS, and SAS similarity are sufficient conditions for two triangles to be similar.
•  distinguish between congruence and similarity theorems.
•  use similarity criteria for triangles to solve problems.

• Students will use similarity criteria for triangles to prove relationships in geometric figures.

Classroom Activities

Tuesday:

1. Students will begin a Scale Drawing project to practice dilations.

Wednesday:

1. Students will log onto Zoom session
2. Students will create a foldable on Similar Triangles
3. Students will also do a guided notes page on ratios and proportions
4. Students will do IXL P.2 and P.4

Thursday/Friday:

1. Students will log onto Zoom session
2. Students will do guided notes on Similar Polygons
3. Students will do the Similar Triangles Scavenger Hunt
Assignments Due
• IXL P.2 and P.4 due on by January 8
• Similar Triangles Scavenger Hunt due by Monday/Tuesday January 11/12