Reflectional and Rotational Symmetry
Presentation
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Mathematics
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8th - 10th Grade
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Practice Problem
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Medium
Standards-aligned
Rogderick Worthy
Used 175+ times
FREE Resource
13 Slides • 13 Questions
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Reflectional and Rotational Symmetry
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Exemplar
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Multiple Select
Select all that apply
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Lines of Symmetry
The line of symmetry can be defined as the axis or imaginary line that passes through the center of the shape or object.
It divides it into identical halves.
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Multiple Choice
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Multiple Choice
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Multiple Choice
How many lines of symmetry do this figure have?
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Exemplar
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Multiple Choice
How many lines of symmetry does this Rhombus have?
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Rhombus
(Diamond) Another common figure which only has 2 lines of symmetry. (Not Regular)
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What Are Regular Polygons?
A regular polygon is an n-sided polygon in which the sides are all the same length and are symmetrically placed about a common center. (Also Equal interior angles)
Equilateral Triangle and Square
Regular: Pentagon, Hexagon, Heptagon, Octagon, Nonagon, Decagon, .......
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Multiple Choice
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Multiple Select
Select two that will map the following figure onto itself.
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Multiple Select
Select two that will map the following figure onto itself.
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Rotational Symmetry
If a figure is rotated around a centre point and it still appears exactly as it did before the rotation, it is said to have rotational symmetry.
In the image is common polygons with either no rotational symmetry or 180 degrees of rotational symmetry.
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Regular Polygons with Rotational Symmetry
The rotational symmetry of a regular polygon is determined by the exterior angle of the regular polygon.
Exterior angle is the minimum degree of rotation.
Exterior Angle = 360 divided by # of sides
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Fill in the Blanks
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Fill in the Blanks
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Fill in the Blanks
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Multiple Select
Select two below that maps the following figure onto itself.
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Multiple Select
Select all that apply.
Reflectional and Rotational Symmetry
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