Geo_Book_Answers

Answers to Exercises
LESSON 0.2
1. compass and straightedge
2. Answer will be the Astrid or 8-Pointed Star,
possibly with variations.
3. Answers will be a design from among the three
choices.
4. The first design has 4-fold symmetry and four
lines of reflectional symmetry. The triangle has
3-fold rotational symmetry and three lines of
reflectional symmetry. The third design has 6-fold
rotational symmetry if you ignore color and 2-fold
rotational symmetry if you don’t.
5. possible answer:
2 lines of
reflectional
symmetry
2 ANSWERS TO EXERCISES
6. possible answer:
7. 3 lines of reflectional
symmetry
3-fold rotational
symmetry: rotated
120, 240, 360