Home Resume Philosophy Unit Plan Lesson Plans Reflections Interests Links
Day 2:
Reflections
Objectives:
Students will be able to define reflection in a given line
Students will be able to define line of symmetry
Students will be able to apply the properties of reflections
Students will be able to relate reflections and line symmetry
Materials:
Miras provided by teacher
Worksheets provided by teacher
Activity:
Teacher shows 2 examples of reflexive symmetry on overheads (5 Min)
The alphabet written with symmetry
The word mirror written with symmetry
Teacher defines the terms and theorems, while giving examples (15 Min)
Reflection: A reflection in a line l is a transformation that maps (moves) every
point P to a point P', so that the following properties are true: 1. If P is
not on l, then l is the perpendicular bisector of segment PP'. 2. IF P is
on l, then P=P'
Examples:
Theorem 7.1: A reflection is an isometry
Line of Symmetry: A figure in a plane has a line of symmetry if the figure can be
mapped onto itself by a reflection
Examples:
4 Lines of Symmetry
2 Lines of Symmetry
Teacher introduces activity (5 Min)
Says the we're going to be finding the reflections of objects using Miras
Demonstrates the activity using one example
Teacher hands out Miras and worksheets
Students participate in planned activity (~15 Min)
Draw the reflection for each worksheet
Vera's Wig: Pick one wig to draw
Fish: Draw the fish caught on the hook
The Hungry Cat: Only draw the fish in the bowls where they fit
The Slide: Draw the spider at 3 points on the thread and eating the fly
Closing
Students turn in results
Assign Homwork
p.334(1-6, 7-17 odd)
Assessment:
Informal
Listen to student comments and questions during the work
Look at the drawings as the students work
Formal
Grade the group results and discussions
Test at the end of the chapter