Topics
9. Transformations & Congruence
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Math 1

9.06 Symmetry

Lesson
Practice

Interactive practice questions

Which five of these shapes have rotational symmetry?

A

B

C

D

E

F

G

H
Easy
< 1min

Which three of these letters have rotational symmetry?

Easy
< 1min

Which four of these figures have rotational symmetry?

Easy
< 1min

Which two of these shapes have rotational symmetry?

Easy
< 1min
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Outcomes

G.CO.2

Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not, e.g., translation versus horizontal stretch.

G.CO.3

Identify the symmetries of a figure, which are the rotations and reflections that carry it onto itself.

G.CO.3a

Identify figures that have line symmetry; draw and use lines of symmetry to analyze properties of shapes.

G.CO.3b

Identify figures that have rotational symmetry; determine the angle of rotation, and use rotational symmetry to analyze properties of shapes.

G.CO.4

Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments.

G.CO.5

Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using items such as graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.

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