1. 1.5 Segment Bisectors & Midpoint
ALGEBRA 1B UNIT 11: DAY 7
1.5 Segment Bisectors & Midpoint

2. Segment Bisector
A segment, ray, line, or plane that intersects a segment at its midpoint. k A M B

3. SEGMENT BISECTOR CONSTRUCTION DEMO

4. SEGMENT BISECTOR PRACTICE
USING A COMPASS & RULER,
CONSTRUCT THE SEGMENT BISECTOR FOR EACH PROBLEM ON THE WORKSHEET BEING PASSED OUT.
COMPARE ANSWERS WITH YOUR NEIGHBOR.

5. Midpoint Ex1: Solve for x. The point that bisects a segment. Bisects?
splits into 2 equal pieces
A M B
12x x+5
12x+3=10x+5
2x=2
x=1
If they are congruent, then set their measures equal to each other!

6. #2 you try!!: Solve for x. 4x-1 = 9x-2 -1 = 5x -2 1 = 5x = x A M B

7. Midpoint Formula

8. Ex3: Find the midpoint of SP if S(-3,-5) & P(5,11).

9. #4 you try: Find the midpoint of SP if S(2,-5) & P(-1,-13).

10. Ex #5: The midpoint of AB is M(2,4). One endpoint is A(-1,7)
Ex #5: The midpoint of AB is M(2,4). One endpoint is A(-1,7). Find the coordinates of B.

11. #6 you try. : The midpoint of AB is M(1,-4). One endpoint is A(3,9)
#6 you try!!: The midpoint of AB is M(1,-4). One endpoint is A(3,9). Find the coordinates of B.