L1.16 - More Symmetry
Learning Intentions and Success Criteria
We are learning to:
- Describe (orally and in writing) the rotations that take a figure onto itself.
- Describe the rotations that take a figure onto itself.
16.1: Which One Doesn't Belong: Symmetry
Which one doesn’t belong?
16.2: Self Rotation
Determine all the angles of rotation that create symmetry for each shape in the applet and complete the following:
- the name of your shape
- the definition of your shape
- drawings of each rotation that creates symmetry
- a description in words of each rotation that creates symmetry, including the center, angle, and direction of rotation
- one non-example (a description and drawing of a rotation that does not result in symmetry)
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
16.3: Parallelogram Symmetry
Clare says, "Last class I thought the parallelogram would have reflection symmetry. I tried using a diagonal as the line of symmetry but it didn’t work. So now I’m doubting that it has rotation symmetry." Lin says, "I thought that too at first, but now I think that a parallelogram does have rotation symmetry. Here, look at this." How could Lin describe to Clare the symmetry she sees?
Sketch shapes in the applet and use ABC Text tool to write a transformation statement for each one.
Learning Intentions and Success Criteria
We are learning to:
- Describe (orally and in writing) the rotations that take a figure onto itself.
- Describe the rotations that take a figure onto itself.
Cool-Down: Mystery Quad
Quadrilateral ABCD has both reflection and rotation symmetry. What type of quadrilateral could ABCD be? Show or explain your reasoning.
Sketch a quadrilateral ABCD that has both reflection and rotation symmetry.
