# vocabulary symmetry line symmetry line of symmetry rotational symmetry center of symmetry order of...

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• symmetry line symmetry line of symmetry rotational symmetry center of symmetry order of symmetry magnitude of symmetry

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Post on 18-Jan-2016

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• Vocabularysymmetryline symmetryline of symmetryrotational symmetrycenter of symmetryorder of symmetrymagnitude of symmetry

• Concept

• Example 1Identify Line Symmetry

A. KALEIDOSCOPES State whether the object appears to have line symmetry. Write yes or no. If so, draw all lines of symmetry, and state their number. Answer: yes; 7 lines of symmetry

• Example 1Identify Line Symmetry

B. KALEIDOSCOPES State whether the object appears to have line symmetry. Write yes or no. If so, draw all lines of symmetry, and state their number.Answer: no

• Example 1Identify Line Symmetry

C. KALEIDOSCOPES State whether the object appears to have line symmetry. Write yes or no. If so, draw all lines of symmetry, and state their number.Answer: yes; 5 lines of symmetry

• ABCDExample 1A.yes; 1 lineB.yes; 2 linesC.yes; 3 linesD.noA. State whether the figure appears to have line symmetry. Write yes or no. If so, state their number.

• ABCDExample 1A.yes; 1 lineB.yes; 2 linesC.yes; 4 linesD.noB. State whether the figure appears to have line symmetry. Write yes or no. If so, state their number.

• ABCDExample 1A.yes; 1 lineB.yes; 2 linesC.yes; 4 linesD.noC. State whether the figure appears to have line symmetry. Write yes or no. If so, state their number.

• Concept

• Example 2Identify Rotational Symmetry

A. State whether the figure has rotational symmetry. Write yes or no. If so, locate the center of symmetry, and state the order and magnitude of symmetry.Answer: Yes the star has order 5 rotatonal symmetry and magnitude 360 5 = 72. The center of the star is the center of rotation.

• Example 2Identify Rotational Symmetry

B. State whether the figure has rotational symmetry. Write yes or no. If so, locate the center of symmetry, and state the order and magnitude of symmetry.Answer: The propeller has order 3 rotational symmetry and magnitude 360 3 = 120. The center of the propeller is the center of rotation.

• Example 2Identify Rotational Symmetry

C. State whether the figure has rotational symmetry. Write yes or no. If so, locate the center of symmetry, and state the order and magnitude of symmetry.Answer: The gear has order 8 rotational symmetry and magnitude 360 8 = 45. The center of the gear is the center of rotation.

• ABCDExample 2A.Yes, order 8 and magnitude 45 B.Yes, order 4 and magnitude 90C.Yes, order 4 and magnitude 180D.No, the figure does not have rotational symmetry.A. State whether the figure has rotational symmetry. If so, state the order and magnitude of symmetry.

• ABCDExample 2A.Yes, order 8 and magnitude 45 B.Yes, order 6 and magnitude 60C.Yes, order 4 and magnitude 90D.No, the figure does not have rotational symmetry.B. State whether the figure has rotational symmetry. If so, state the order and magnitude of symmetry.

• ABCDExample 2A.Yes, order 3 and magnitude 90 B.Yes, order 4 and magnitude 90C.Yes, order 2 and magnitude 180D.No, the figure does not have rotational symmetry.C. State whether the figure has rotational symmetry. If so, state the order and magnitude of symmetry.

• Concept

• Example 3Three-Dimensional SymmetryA. State whether the figure has plane symmetry, axis symmetry, both, or neither.Answer: both plane and axis symmetry

• Example 3Three-Dimensional Symmetry

B. State whether the figure has plane symmetry, axis symmetry, both, or neither.Answer: neither plane nor axis symmetry

• ABCDExample 3A.plane symmetryB.axis symmetryC.bothD.neitherA. State whether the figure has plane symmetry, axis symmetry, both or neither.

• ABCDExample 3A.plane symmetryB.axis symmetryC.bothD.neitherB. State whether the figure has plane symmetry, axis symmetry, both or neither.