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12.5 a line that is even a line that divides a figure into 2 congruent parts. a line that divides a figure into 3 congruent parts. a line that can be divided into 2 congruent parts. 1. What is a line of symmetry? 12.5 2. True or False A figure is said to be symmetric if there is a transformation that can trace the figure backonto itself. True False 3. Drag the correct label to each figure to tell if the figure has symmetry and how many lines of symmetry it has. 12.5 no lines ofsymmetry ? 2 lines of symmetry ? infinite lines of symmetry ? 12.1 4. Tell if the figure is reflection symmetric. If so, tell how many lines of symmetry the figure has. No, not reflection symmetric Yes, 2 lines of symmetry Yes, 1 line of symmetry Yes, infinite lines of symmetry 12.1 5. Tell if the figure is reflection symmetric. If so, tell how many lines of symmetry the figure has. (ignore color and shadow - think only about the shape/figure itself) No, not reflection symmetric Yes, 2 lines of symmetry Yes, 1 line of symmetry Yes, infinite lines of symmetry 12.1 6. Tell if the figure is reflection symmetric. If so, tell how many lines of symmetry the figure has. No, not reflection symmetric Yes, 2 lines of symmetry Yes, 1 line of symmetry Yes, infinite lines of symmetry 12.5 7. What is the "order" of rotational symmetry mean? The number of vertices of the preimage. The smallest degree in which you turn the preimage to coincide with the image. The number of times the figure can be rotated to coincide with the preimage. 12.5 8. Tell if the following figure is rotationally symmetric and if so, what is the order. No, not rotationally symmetric Yes, order is 1 Yes, order is 2 Yes, order is 3 12.5 9. Tell what the angle of rotational symmetry is for the following figure. 3 degrees 60 degrees 120 degrees 180 degrees 12.5 10. Tell what the angle of rotational symmetry is for the following ambigram. 3 degrees 60 degrees 120 degrees 180 degrees 12.5 11. Tell if the following figure is rotationally symmetric and if so, what is the order. No, not rotationally symmetric Yes, order is 1 Yes, order is 2 Yes, order is 3 12.5 12. Tell if the following figure is rotationally symmetric and if so, what is the order. No, not rotationally symmetric Yes, order is 4 Yes, order is 3 Yes, order is 2 12.5 13. Tell if the following figure is rotationally symmetric and if so, what is the order. No, not rotationally symmetric Yes, order is 3 Yes, order is 4 Yes, order is 6 |