1. Geometry
Lesson 5.4

2. Take out your notes
We are going to do Section 5.4

3. What is a median?
Connects a midpoint to the opposite vertex

4. What is a midsegment?
Connects two midpoints

5. Find the midpoint of side AB
(-3, 0)
(1, 2)
(-1, -1)
(-1, 1)
(-2, 1)
(-2, -1) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

6. Find the midpoint of side AC
(1, 2)
(3, -2)
(2, 2)
(0, 2)
(2, 0)
None of the above 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

7. Find the midpoint of side BC
(-3, 0)
(3, -2)
(2, -1)
(1, 0)
(0, 1)
None of the above 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

8. What name would you give to seg EF?
Median
Midsegment
Perp. Bisector
Angle Bisector
Altitude 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

9. What is the length of seg AB?1 2 3 4 5 6
None of the above 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

10. What is the length of seg EF?1
1.5 2
2.5 3
3.5
None of the above 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

11. What is the length of AC? 5 8 2.8 10 None of the above 1 2 3 4 5 6 7 89 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

12. What is the length of midsegment DF?5 8
2.8 10
None of the above 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

13. What is the slope of AC? 4/3 3/4 -3/4 None of the above 1 2 3 4 5 6 78 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

14. What is the slope of DF? 4/3 3/4 -3/4 None of the above 1 2 3 4 5 6 78 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

15. When slopes of two lines are equal, then the two lines are _______.
Skew
Intersecting
Perpendicular
Parallel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

16. Theorem 5.9 – Midsegment Theorem
A midsegment is half the length of and parallel to the opposite side.

17. Given that midsegment DE = 3.5, determine BC7
3.5
6.5
1.75 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

18. Given that BC = 12, determine DE24 12 6 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

19. Given that the slope of line AB is 2/3, determine the slope of line EF
3/2
2/3
-3/2
-2/3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30