# Q2, W2: October 21-25 Geometry

Teacher Kristin Andreason Geometry Honors 8 October 21-25 Unit 2(A): Triangle Congruence and Proofs
Standard(s) Taught

MAFS.912.G-CO.1.3:  Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself.

MAFS.912.G-CO.1.5:  Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure.  Specify the sequence of transformations that will carry a given figure onto another.

MAFS.912.G-CO.3.10:  Prove theorems about triangles, use theorems about triangles to solve problems.

Learning Targets and Learning Criteria
• Students will learn how to determine the reflections and rotations that will map a regular polygon onto itself.
• Students will be able to calculate the number of lines of reflection symmetry and the degree of rotational symmetry of any regular polygon.
• Students will be able to predict and verify the sequence of transformations (a composition) that will map a figure onto another.
• Students will be able to classify triangles by sides and angles.
• Students will be able to solve problems using theorems and postulates about triangles.
Classroom Activities

Monday/Tuesday:

• Students will take notes in ISN (p.15) on Rotational Symmetry of Regular Polygons
• We will use the Geogebra Applet to see how regular polygons rotate onto themselves
• We will do IXL L.11 together in class
• Students will also work on finishing their IXL’s L.2, L.3, and L.8 and/or Mathspace

Wednesday:

• We will review for the test on Transformations by doing select problems in the Geometry Nation Practice Book on pages 55-67.

Thursday/Friday

• Students will take the Summative on Transformations
• Students will take notes on Clsssifying Triangles (p.16) and the Angle Sum Theorem (p.17)
Assignments Due
• Summative on Transformations is due by Wednesday, October 23