1. mABD = (3x +12) , mBDE = (7x - 32)
Warm Up
Q: mABD and mBDE are supplementary. Find the measures of both angles.
mABD = (3x +12) , mBDE = (7x - 32)
A: mABD = mBDE =

3. Assignments There are 7 Warm-ups Week 1
Periods 2 & 3  are one day behind due to seminars
Week 1
8/18/08 - Went over Respect, Attitude, & Discipline
8/19/08 - Covered Expectations & Consequences
8/20/08 - Lesson 1-1   p. 9   #13-28, 30-40, 54,56,57
8/21/08 - Lesson 1-2   p. 16  #7-15, ev, 34-37,56-57      
8/22/08 - Pre-Assessment testing
Week 2
8/25/08 - Lesson 1-4   p. 33   #4-36 even, 42,50        
8/26/08 - Lesson 1-5   p. 41   # 8-22,  even,  41, 43
8/27/08 – Lesson 1-3
8/28/08 - Review
There are 7 Warm-ups

4. Students should be able to find the distance between two points and find the midpoint of a segment.

5. Finding Distance on a Number Line
Count the tick marks
Minus the larger number from the smaller number
Distance between A and B = I B – A I or I A – B I A B

6. Finding Distance on a Number Line
Ok now try this one.
AB = I 3 – -3 I or I -3 – 3 I
AB = I 6 I or I -6 I A B

7. Finding Distance on a Number Line
Ok now try this one.
AB = I 2 – -10 I or I -10 – 2 I
AB = I 12 I or I -12 I A B
-10 -8 -6 -4 -2 2

8. Finding Distance between two points on a coordinate plane
Find the Distance between ( 5, 1 ) and ( -3, -3 )
Graph your points.
Form a right triangle.
Determine the lengths of the two sides.
Plug into the Pythagorean theorem. (a2 + b2 = c2)

9. Finding Distance between two points on a coordinate plane
Now lets take the Pythagorean theorem and turn it into the distance formula

10. Finding Distance between two points on a coordinate plane
Find the Distance between ( 5, 1 ) and ( -3, -3 )
Graph your points.
Plug points into the distance formula.

11. Finding the midpoint of a line
Graph the points A (5, 5) and B (-1, 5). Draw AB.
Hold the paper up to the light and fold the paper so that points A and B match exactly. Crease the paper slightly.
Open the paper and put a point where the crease intersects AB. Label this midpoint as C.

12. Finding the midpoint of a line
What are the coordinates of point C?
What are the lengths of AC and CB?
What kind of rule can we make from this?

13. Finding the midpoint of a line
So how can we find the midpoint of this line?
Add the two points together and divide by two. A M B
-10 -8 -6 -4 -2 2

14. Finding the midpoint between two points on a coordinate plane
Find the Distance between ( 5, 1 ) and ( -3, -3 )
How would we find half?

15. Finding the endpoint of a line when given a midpoint and a point on a coordinate plane
Find the coordinates of X if Y ( -2, 2 ) is the midpoint of XZ and Z has coordinates ( 2, 8 ).

16. any segment, line, or plane that intersects a segment at its midpoint
Segment bisector:

17. Homework: Lesson 1-3, p. 25 # 4-40 even, 44, 55, 57, 58