Geo_Book_Answers

Answers to Exercises
CHAPTER 2 • CHAPTER 2
CHAPTER 2 • CHAPTER
LESSON 2.1
1. “All rocks sink.” Stony needs to find one rock
that will not sink.
2. If two angles are formed by drawing a ray from a
line, then their measures add up to 180°.
3. 10,000, 100,000, ....Each term is 10 times the
previous term.
4. 5 ,1,....(Written 6 with the common
denominator 6, the pattern becomes
1 , 2 , 3 , 4 , 5 , 6
6 6 6 6 6 6 ,....)
5. 17, 21 6. 28, 36
7. 21, 34 8. 49, 64
9. 10, 24 10. 64, 128
11. 12.
13. 14.
15. 16.
17. 1, 4, 7, 10, 13 18. 15, 21, 28, 36, 45
19. Answers will vary.
20. sample answers:3,6,12,24,48,...and 4,8,12,
16, 20, . . .
21. Answers will vary.
22. 7th term: 56; 10th term: 110; 25th term: 650
23. Conjecture is false; 14 2 196 but 41 2 1681.
24. 11,111 11,111 123,454,321. For the sixth
line, if 111,111 is multiplied by itself, then the
product will be 12,345,654,321. But 1,111,111,111
1,111,111,111 1,234,567,900,987,654,321.
25. 26.
27. 28.
29. possible answers:
30. sample answer:
31. collinear 32. isosceles
33. dodecagon 34. parallel
35. protractor 36. radius
37. diagonal 38. regular
39. 90° 40. perpendicular
41. sample answer: 42. sample answer:
A G
N T
I
43. sample answer: 44. possible answer:
45. Methods will vary. It is not possible to draw a
second triangle with the same angle measures and
side length that is not congruent to the first.
C
40 60
A 9 cm B
A C Clearly AC
does not
bisect A
or C.
ANSWERS TO EXERCISES 23
Answers to Exercises