1.4 and 1.5

Quiz on Friday!

• When two lines intersect, they intersect in a ___________Point

• When two planes intersect they intersect in a ___________Line

BEandAC

DFandBE

1. Name the intersection of

•B

2. Name the intersection of

•E

3. Name the intersection of DFandAC

None, they are parallel

1. Name the intersection of planes S and R

Line k

2. Name the intersection of planes R and T

None, they are parallel

3. Name the intersection of planes T and S

Line L

1.5 Segments and their measures

• Coordinates: the number that corresponds the point on the number line

•Distance: The distance between point A and point B is written as AB

It is also the length of AB

DE + EF = DF

10 + x = 16

-10 -10

x = 6

So, EF = 6

AB + BC = AC

14 + 6 = AC

20 = AC

ST + TR = SR

x + 15 = 23

- 15 -15

x = 8

So, ST = 8