A figure, picture, or pattern has symmetry when its parts match in size and shape across a line, so one side can be seen as a reflection of the other; the line may be vertical or horizontal. Learners identify and describe familiar examples, including figures that do not match symmetrically, without yet analyzing rotational symmetry, formal transformations, or symmetry in complex shapes.
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Detailed Explanation: Recognize symmetry informally
Symmetry means that two parts of a picture match like a reflection in a mirror. The matching line can go up and down or side to side.
Example: Does a butterfly have symmetry?
- Imagine a line going straight down the butterfly’s body.
- Look at the left wing and the right wing.
- The wings match in size and shape.
- The spots on one wing match the spots on the other wing.
- If you folded the butterfly along its body, the two sides would line up.
So, the butterfly has vertical symmetry. Its left side is a reflection of its right side.
Learn by doing: Recognize symmetry informally
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Practice:
2D Shape (Picture) Line Symmetry - Which is Symmetric
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Download/Modify Free Grade 1 'Recognize symmetry informally' Worksheet
Print this free 'Recognize symmetry informally' worksheet to practice this skill away from the computer. Click 'Modify' to easily customize this worksheet to your exact needs.
This Worksheet Includes:
- 2D Shape (Picture) Line Symmetry - Which is Symmetric
- 2D Shape (Picture) Line Symmetry - Is This a Line of Symmetry
- 2D Shape (Picture) Line Symmetry - Where Is Line of Symmetry
- 2D Shape Symmetry - Which Shape Is Symmetric
- 2D Shape Symmetry - Is This Symmetric
- 2D Shape Symmetry - Which is Symmetric
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