1. Sept 1st
midpoint

2. Sept 1st Learning Target: construct using a compass
In class: notes: vocabulary and construction
HW: none
Warmup:
1.Find the average of 8, 3, 7,9
2. Find the average of 3 and -9

3. Finding the midpoint 9/1
Midpoint: The point that is exactly in the middle of a segment
Draw a segment
Put pointer on endpoint, make an arc above and below. Repeat for other endpoint
Use a straightedge to see where the connection of the “x” would intersect

4. Segment Bisector
Segment bisector: a segment that cuts another segment in two equal pieces at the midpoint.
Draw a line through the midpoint.

5. Perpendicular bisector
Perpendicular bisector: A line/segment that cuts another segment into two equal pieces at a 90 degree angle through the midpoint.
Connect the “x”s

6. Sept. 2nd
Learning Target: Find the midpoint between two points on a Cartesian coordinate plane.
In class: Midpoint notes, exit slip(?)
HW: wks circled problems
Warm up:

7. Midpoint /2
EXAMPLE: Find the midpoint of 𝐽𝐾 if J is on the number line at -4 and K is at 8.
Its finding the average of the numbers

8. EX: Find the coordinate of the midpoint of 𝐺𝐻 for G( 7,-6) and H(-3, 2)
Let’s sketch it:
Use the formula:
Midpoint =

9. Algebra What is the measure of 𝑃𝑅 if Q is the midpoint of 𝑃𝑅 ? 6-3x

10. Finding an endpoint
EX: Find the coordinates of D if E(-6, 4) is the midpoint of 𝐷𝐹 and F has coordinates (-5,-3).
Method 1: sketch it on graph paper….
Method 2: Use formula