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TRANSCRIPT
TRANSFORMATIONS
The result of moving a shape according to a rule; translations, reflections, and rotations are all ways to transform shapes.
OUTCOMES:
Perform a single transformation (translation, rotation or reflection) of a 2-D shape, and draw and describe the image.
Identify and describe a single transformation, including a translation, rotation and reflection of 2-D shapes.
TRANSLATIONS:
The result of sliding a shape along a straight line.
Translation Rule: A way of describing a translation with pictures or numbers. Ex: 2 units left, 2 units up
INTERACTIVE PRACTICE
http://www.teacherled.com/resources/translation/translationload.html
GENERAL PROPERTIES TO IDENTIFY TRANSLATIONS:
the 2-D shape and its image are congruent (size and shape are the same)
the 2-D shape and its image have the same orientation (that is, if we go around the object ABCD in a clockwise direction, we should be able to also go around its image A'B'C'D' in a clockwise direction.)
PRACTICE
Lesson #1: Page 153, # 1, 2 & 3 Tasks # 1, 2, 3, & 4 Workbook, page 37 Extra Practice Sheets 1 & 2
REFLECTION:
The result of flipping a 2-D shape across a line of reflection.
Line of Reflection: A line that falls exactly halfway between the points of a shape and the matching points of its reflection.
GENERAL PROPERTIES TO IDENTIFY REFLECTIONS:
- a 2-D shape and its image are congruent
- a 2-D shape and its image are of opposite orientation (This is, if we go around the object ABCD in a clockwise direction, the image A'B'C'D‘ would require a counter-clockwise direction.)
ROTATION:
The result of turning a shape. Center of Rotation: The point that a shape
turns around Clockwise (cw): The direction a clock’s hands
move. Counterclockwise (ccw): The opposite
direction to clockwise. Orientation: When the orientation of a shape
changes, the vertices of the shape will be in a different order.
INTERACTIVE PRACTICE
TeacherLED Interactive Whiteboard Resource Rotation Around Point