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Object Reflections and Symmetry Module 9. Session Topics ● Reflection of an object ● Planes of symmetry ● Reflections through rotations.

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Presentation on theme: "Object Reflections and Symmetry Module 9. Session Topics ● Reflection of an object ● Planes of symmetry ● Reflections through rotations."— Presentation transcript:

1 Object Reflections and Symmetry Module 9

2 Session Topics ● Reflection of an object ● Planes of symmetry ● Reflections through rotations

3 Object Transformations: Reflection Reflection Plane Each point, A, is associated with an image point, A’, such that the plane, P, is a perpendicular bisector of the line segment AA’. A reflection across a plane displays the object’s mirror image.

4 Object Transformations: Reflection Plane of symmetry occurs if the parts of the object on both sides of the plane are mirror images of each other.

5 Object Transformations: Reflection through Rotation For a symmetric object, the mirror image can occur by rotating one side of the object 180°about an axis of rotation that's in the plane of symmetry.

6 Object Transformations: Reflection Many objects have multiple planes of symmetry Infinite52

7 Course Software….. ● Work through the Reflections and Symmetry software module

8 Object Reflections and Symmetry Homework … ● Complete the following pages in Module 9 ● reflx/sym- – 2 - 5 – 8 - 9 – 12 - 15

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