1. 1-6 Midpoint Find the midpoint of: DE: DC: AB: AE: (2+5) / 2 = 3.5
(2+0) / 2 = 1
(-5+-3) / 2 = -4
(-5+5) / 2 = 0

2. Find the midpoint of: AC: DC: BC: AB:
(4+-3) / 2 = 0.5 A
(-6+-3) / 2 = -4.5 B
(1+-3) / 2 = -1
(4+1) / 2 = 2.5 C D

3. Find the midpoint of: AB: BC: AC:
(1, 1) A
(2, -2) B
(-2, -1) C

4. Midpoint formula:

5. Example

6. Example

7. If M is the midpoint of AB, what are the coordinates of B?
Count
From A to M:
Down 2, right 4
From M to B:
B(5, -3) M

8. If K is the midpoint of ST, what are the coordinates of T?
Count
From S to K:
Up 3, left 2
From K to T:
T(-4, 5) K S

9. Finding an Endpoint

10. Finding an Endpoint