SB Enr Geom 1­8 Completed.notebook
September 12, 2012
Lesson 1­8 The Coordinate Plane
Quadrant ___
( , )
Quadrant ___
( , )
( , )
Quadrant ___
( , )
Quadrant ___
( , )
Aug 28­8:28 AM
coordinate ­ location of a point on the coordinate plane ( x , y )
Distance Formula ­ used to find the distance between two points
d = √ (x2 ­ x1)2 + (y2 ­ y1)2 Expl 1.
Find the distance between T(5,2) and R(­4,­1) to the nearest tenth.
Ckpt 1.
a. AB has endpoints A(1,­3) and B(­4,4). Find AB to the nearest tenth.
b. Suppose A(­4,4) and B(1,­3). Do you get the same result? Why?
Aug 28­8:32 AM
1
SB Enr Geom 1­8 Completed.notebook
September 12, 2012
Expl 2. ­ in your book.
Ckpt 2
a. Find the distance between Elm Station and Symphony Station.
b. Maple Station is located 6 miles west and 2 miles north of City Plaza. Find the distance between Cedar Station and Maple Station.
Aug 28­8:39 AM
What is the midpoint of the segment?
What is the math? What is this called?
Midpoint Formula ­ formula to find the midpoint of a segment
M = ( x1 + x2 , y1 + y2 )
2 2
Aug 28­8:42 AM
2
SB Enr Geom 1­8 Completed.notebook
September 12, 2012
Expl 3. QS has endpoints Q(3,5) and S(7,­9). Find the midpoint.
Ckpt 3. Find the coordinates of the midpoint XY with endpoints X(2,­5) and Y(6,13).
Aug 28­8:47 AM
Expl 4. The midpoint of AB is M(3,4). One endpoint is A(­3,­2). Find the coordinates of the other endpoint B.
Ckpt 4. The midpoint of XY has coordinates (4,­6). X has coordinates (2,­3). Find the coordinates of Y. Aug 28­8:49 AM
3
SB Enr Geom 1­8 Completed.notebook
September 12, 2012
Homework
Lesson 1­8
2­52E, 64­66
Aug 28­8:52 AM
4