Answer the following questions with true or false: 1. Line PF ends at point F. 2. Planes have edges. 3. Line XY can be written two different ways. 4. Line PF has no thickness.
Mar 26, 2016
Answer the following questions with true or false:
1. Line PF ends at point F.2. Planes have edges.3. Line XY can be written two different
ways.4. Line PF has no thickness.
Obj: Find the length of a segment using SAP
2 specific endpoints Infinite amount of points in between Notation: AB
A
B
Sun One endpoint Extends infinitely in one direction Notation (BE CAREFUL):ABA
B
QA and QB are opposite rays if Q is between A and B.
Example: Opposite Rays
Distance between two points
Notation: AB
MJ
1-1 0
Give the proper term that describes each of the following:
1. 2. 3. 4.
1. segment XY 2. Ray MN 3. Length of CD 4. Line JK
XY MN CD JK
Accepted…without proof!
First postulateSAP
If B is between A and C, then…….. AB + BC = AC
B is between A and C. AB = x, BC = x + 6, and AC = 24 Find AB and BC.
Draw a diagram FIRST!!!
Page 14; 1-11 CLASSROOM EXERCISES
A is between C and T. If CA = 3x – 5, AT = 10 and CT = 4x,Find CT.
1. segment, ray, line, length2. 2; 1; 03. Yes4. No 8. T5. Yes 9. 1; 1; 46. Yes 10. QR, RS, ST7. -2, 0 11. Ray ST
Objective- Calculate the midpoint of a segment.
Same size and shape Symbol: Notation:
Congruent Segments = same length Notation: XY = EF
How to mark congruent segments: More than one pair of congruent segments?
EFXY
X
F
E
Y
Point that divides a segment into two congruent segments
The definition of a midpoint says that two segments are congruent!!!
Find the coordinate of the midpoint of segment AB if the coordinate of A is -7 and the coordinate of B is 15.
Draw the diagram first!
E is the midpoint of DF. If DE = 4x + 5 and EF = 49, find the
value of x.
Line, segment, ray or plane that intersects a segment at its midpoint.
The definition of a bisector says that a point is a midpoint!!!
Segment Bisector
What is the difference between a midpoint and a bisector?
Draw two points P and Q on the patty paper.
Fold the paper so that fold line f contains both P and Q.
Unfold the paper Now fold so that P falls on Q. Call the second fold g.
Lay the paper flat and label the intersection of f and g as point X.
How are points P, Q, and X related? How is line g related to segment PQ?
Page 15-16; 1-35 OddWritten Exercises