What We Did Today:
Students started Problem 1.1, Butterfly Symmetry: Line Reflections. Students discovered relationship between a line of reflection and the line segments drawn from an original vertex to its reflection vertex. Students used these generalized relationships to draw their own reflections. The line of reflection intersects each line segment at its midpoint, meaning any vertex and its reflection vertex are equidistant to the line of reflection. Students also found that the line of reflection is perpendicular to each line segment. Notes are available by clicking here.
Focus Question:
What does it mean to say that a figure has flip or reflectional symmetry? How is each point related to its image under transformation by reflection in a line?
Vocabulary Discussed:
Homework:
None.
Students started Problem 1.1, Butterfly Symmetry: Line Reflections. Students discovered relationship between a line of reflection and the line segments drawn from an original vertex to its reflection vertex. Students used these generalized relationships to draw their own reflections. The line of reflection intersects each line segment at its midpoint, meaning any vertex and its reflection vertex are equidistant to the line of reflection. Students also found that the line of reflection is perpendicular to each line segment. Notes are available by clicking here.
Focus Question:
What does it mean to say that a figure has flip or reflectional symmetry? How is each point related to its image under transformation by reflection in a line?
Vocabulary Discussed:
- basic design element
- line of symmetry
- line reflection
- reflectional symmetry
- symmetry
- transformation
Homework:
None.