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Published byJulian Pierce Modified over 9 years ago
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2.4 –Symmetry
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Line of Symmetry: A line that folds a shape in half that is a mirror image
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1. For each image below, reflect the shape over the line.
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2. Determine if the shapes have line symmetry. If it does, draw in all possible lines of symmetry.
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one
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none
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one
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two
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Rotational Symmetry: A degree that turns a shape onto itself 360° # matches Degree =
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3. Determine if the shape has rotational symmetry. If it does, find the degree of rotational symmetry.
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90 °, 180 °, 270 °, 360 °
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b. 120 °, 240 °, 360 °
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60 °, 120 °, 180 °, 240 °, 300 °, 360 °
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none
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4. Below are the most common geometric shapes you will be learning throughout geometry. Identify if the shapes have reflection symmetry, rotation symmetry, both, or none. If it has reflection symmetry, state how many lines of symmetry it has. If it has rotation symmetry, state the degree of rotation.
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6 lines 60 °, 120 °, 180 °, 240 °, 300 °, 360 ° 1 line No rotation
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2 lines 180 °, No line 360 ° No rotation
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No line 3 lines 120 °, 240 °, 360 ° No rotation
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4 lines 90 °, 180 °, 360 ° 270 °, 1 line No rotation
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infinite2 lines 180 °, 360 ° infinite
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No line 1 line No rotation
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No line1 line No rotation
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no line 180 °, 5 lines 72 °, 144 °, 288 °, 216 °, 360 °
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