1. (30 points, 3 points for each item, no partial credits) Please circle one and only one answer for each of the following statements/questions. 1) Let a = nOmg. Then a is always a glide-reflection. True. False. 2) An opposite isometry is a glide-reflection. True. False. 3) Any isometry is either a translation, or a rotation, or a reflection. True. False. 4) Let a = 040mOs and a= i. Then a is a reflection. True. False. 5) Let a = 000, where a, b and care distinct and parallel to each other. a is a translation . rotation, reflection. 6) Let a = 0,000 where a, b and care distinct and concurrent with each other. a is a translation. rotation. reflection. 7) Let a = Bp. where A, B and D are non-colinear. Then a is a translation . rotation, reflection. 8) Let a be a translation through vector = (2,0), then ad (1.2) is a half turn. The center of ao (1.2) is: (-2,-2); (2, 2); (0,2); (0,-2) 9) ABA is involutoric. True. False. 10) (020,0)4 is a translation. True. False. 1. (30 points, 3 points for each item, no partial credits) Please circle one and only one answer for each of the following statements/questions. 1) Let a = nOmg. Then a is always a glide-reflection. True. False. 2) An opposite isometry is a glide-reflection. True. False. 3) Any isometry is either a translation, or a rotation, or a reflection. True. False. 4) Let a = 040mOs and a= i. Then a is a reflection. True. False. 5) Let a = 000, where a, b and care distinct and parallel to each other. a is a translation . rotation, reflection. 6) Let a = 0,000 where a, b and care distinct and concurrent with each other. a is a translation. rotation. reflection. 7) Let a = Bp. where A, B and D are non-colinear. Then a is a translation . rotation, reflection. 8) Let a be a translation through vector = (2,0), then ad (1.2) is a half turn. The center of ao (1.2) is: (-2,-2); (2, 2); (0,2); (0,-2) 9) ABA is involutoric. True. False. 10) (020,0)4 is a translation. True. False