Transcript Slide 1

Warm Up
Simplify.
1. 7 – (–3) 10
2. –1 – (–13) 12
3. |–7 – 1| 8
Solve each equation.
4. 2x + 3 = 9x – 11
2
5. 3x = 4x – 5
5
6. How many numbers are there between
Infinitely many
and
?
13. B, E, A
31. A
14. B, C, D, E
32. N
15. plane ABC
33. A
16. see pictures
34. S
17. see pictures
35. If 2 pts lie in a plane, then the line containing
18. G, J, and l
2 pts also lies in the plane
19. planes T and S
36. ¼
20. see pics
37. Through any 3 noncollinear pts there is
21. see pics
exactly one plan containing them.
22. stakes, bones, squares
39. C
23. see pics
40. F
24. see pics
41. D
25. U
43. 6
26. U
44. 45
27. U
45. n(n – 1)/2
28. If 2 pts lie in a plane, then the line containing 2 pts also lies in the plane
Coordinate: Number on ruler that corresponds to a point
Distance: between two points is the abs. value of the difference
of the coordinates, also called LENGTH
Ex. 1:
3½
4½
Congruent Segments: Segments with same length
Use TICK MARKS to show congruent segments. Add a tick mark
for each group of congruent segments.
Ex. :
1⅓ + YZ = 3
XY + YZ = XZ
YZ = 1⅔
DE + EF = DF
3x – 1 + 13 = 6x
3x + 12 = 6x
12 = 3x
4=x
DF = 6x = 6(4) = 24
Midpoint: A point that BISECTS, divides, segment into two
congruent segments
If M is midpoint of AB, then AM = MB.
Ex. 4:
XR + RS = XS
365 + RS = 2000
XR + RY
RS = 1635
365 + 817.5 = 1182.5 m
RY = YS = 817.5