Length of segment AB is written AB
AB - "What is the measure?"
AB=la-bl
a is the coordinate of A
b is the coordinate of B
AB=|-2 4|=6
Ruler Postualte: to find the distance between 2 points, subtract the measure and take the absolute value.
Segment Addition Postulate: If upi add two segments together, and they share only one common endpoint, then they add to make a bigger segment.
Example
Segment EF = 4x-20. Segment FG = 2x+30. Segment EG = 100. Fine x, EF, and FG.
To find X:
4x-20 + 2x+30 = 100
6x+10 = 100
6x = 90
x = 15
To find EF:
EF = 4x-20
EF = 4(15)-20
EF = 60-20
EF = 40
To find FG:
FG = 2x+30
FG = 2(15)+30
FG = 30+30
FG = 60
Ang angle is formed by two rays (called sides) with the same endpoint (called the vertex).
Line BA and Line BC are the sides. B is the vertex.
Find QS. Q=-5 and S=37
QS=|-5-37|=