1. 1.3 Midpoint and Distance

2. Midpoint
The midpoint is the point on a segment that divides the segment into two equal parts

3. How do I find the midpoint?
All you do is average the numbers!
The midpoint of 4 and 6 is 5 right? Just the average.

4. So how do I find the midpoint of (3,3) and (4,5)
If it is an ordered pair, nothing changes. Average the X values and the Y values
The X values are 3 and 4. the average is 3.5
The Y values are 5 and 3 the average is 4
The midpoint is at (3.5,4)

5. Midpoint formula

6. Segment Bisector
This is a point, line, ray, or plane that bisects a segment
Bisect means to cut in 2 equal parts

7. Given a midpoint and end point find the other endpoint
To find the other endpoint or X
Double the midpoint, subtract the endpoint you know
2-8 = -6
The other endpoint is at -6

8. What grade do I need?
In my history class the teacher only takes 2 grades. They are averaged to give me my final grade.
I make an 87 on the first test. What grade do I need on the second test to have a 90 average?
Can you think of another process to get your answer ?