Bell Work

1
Bell Work

• In your group, discuss what is parallel plane?
• What is parallel plane?
• Look at the picture given, please give at least 4
  answers for each (one person has to at least
  write one of the answers)
• Which lines are parallel?
• Which planes are parallel?

2
Bell Work

• Each one of you will have a blank computer paper
• On the computer paper, you need to draw something
  (use your imagination) using ONLY straight lines.
  Here are some things you can draw
• A house
• A robot
• House design
• Buildings
• Flowers
• Trees
• bridge
• Etc. (I want you guys to think of something
  creative!)
• The computer paper should be about 60 full with
  at least 2 different things on there. (There
  should not be a lot of white space)
• When you are done drawing you need to measure the
  length of the lines you drew and put the length
  (in cm) next to the line
• Also you need to use the protractor to measure
  the angles of each intersections.

3
Bell Work

• In your group, solve the following problems. The
  color indicate the person thatll write the
  answer to the question.
• (4 Questions about line segments One with
  midpoint easy, one with entire length easy,
  one with entire length with variable, one with
  midpoint with markings to represent congruent
  parts)

4
Chapter 1.5 Measuring Segments

• 4.0 Students prove basic theorems involving
  congruence

5
Vocabulary

• Coordinate its distance and direction from the
  origin of a number line. The coordinates of a
  point on a coordinate plane are in the form
  (x,y), where x is the x-coordinate and y is the
  y-coordinate

6
Vocabulary

• Congruent segments segments that have the same
  length
• Symbol

Question Which segments are congruent?
Note Difference between EQUAL and CONGRUENT
7
Vocabulary

• Midpoint a point that divides the segment into
  two congruent segments. A midpoint, or any line,
  ray, or other segment through a midpoint is said
  to bisect the segment

M is the midpoint
8
Activity (interwrite)
Are and congruent?
9
Segment Addition Postulate

• If three points A, B and C are collinear and B is
  between A and C, then ABBCAC

10
Example 1

• If AC60, find the value of x. Then find AB and
  BC

A
B
C
2x-8
3x-12
11
Example 2

• If AC100, find the value of x. Then find AB and
  BC

A
B
C
4x-20
2x30
12
Example 3

• B is the midpoint of AC. Find AB and BC

B
A
C
2x-1
3x-4
13
Fact about congruent

• When you have two segment/angles/etc that are
  congruent, you can set them equal to each other.

14
Activity (5 min)

• Write the summary about this section in your
  Cornell note.
• Some questions to consider
• What is the topic about?
• What did I learn from this lesson?
• What questions do I have?

15
Homework

• P 33 1-4, 8, 10-12, 13, 14