Points, Lines, Planes, part 2
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Printed: July 17, 2012
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C ONCEPT
1
1
Points, Lines, Planes, part 2
Lesson Plan
Launch (10 mins)
• Students : Identify points, lines, and planes around the room then describe why they represent each word.
• Have the answers to last night’s homework with work shown on the board when students walk in class. Once
students finish their launch, have them check their answers from the answers on the board. Before debriefing
launch, go over difficult problems from last night’s HW and ask for specific questions.
• Pass out personal white boards and erasers for activity later in the lesson.
• Debrief : Have students turn to a partner around them and share answers to the launch.
– Encourage students to challenge each other
– Have students read exactly what they wrote.
– Have students share out one for each word.
Presentation (20 mins)
• (5 mins) Simon Says: Pass out dry erase markers. Play the childhood game “Simon Says” except the students
will be sketching Points, Lines, Planes, Segments, and Rays.
– Sample questions; Simon says sketch point P, sketch line AB, sketch Plane C, Sketch plane ABC, sketch
Ray RT, use proper notation to name any of the above.
– Walk around the classroom and use student boards as examples
• (5 mins) Discussion: “What is a co-worker?” Have a small discussion with the students allowing them to
connect this prior knowledge to the new vocabulary for today.
– “So then what do you believe Co-Planar means?” Link the prior knowledge to coplanar, collinear, noncoplanar, non-collinear
• (5 mins) Vocabuary: formally define coplanar, collinear, non-coplanar, non-collinear then work through the
examples
• (5 mins) Simon Says: Play the game again and use the new vocabulary mixed with the old vocabulary.
Practice (15)
• Students will complete the practice individually while the teacher walks around and helps individual students
Conclusion (10)
• (5 mins) Students: They will sketch the geometric situation then explain, in complete sentences, why their
picture properly represents the situation.
Concept 1. Points, Lines, Planes, part 2
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• (5 mins) Debrief: Walk around the room while the students properly answer the questions. Look for one
correct and one incorrect pictures for each situation. Ask those students to sketch that same picture on their
whiteboard. Then when debriefing, show the boards while they read the sentence they wrote. Have the class
decided which one is correct and critic the work.
Exit Ticket (5)
• Hand the exit tickets to students and have the students complete it individually. When they finish, collect them
however you like. Have a student collect only the white board pens before students leave the classroom
Materials
• Class set of white boards/pens/erasers
• Lesson Packets
Launch
Presentation
Vocabulary
TABLE 1.1:
Word
Coplanar
Collinear
Example:
Definition
Word
Non-Coplanar
Non-Collinear
Definition
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Practice
Complete the table below.
Concept 1. Points, Lines, Planes, part 2
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Conclusion
Sketch an example of each situation below then EXPLAIN (using complete sentences) why your example is correct.
TABLE 1.2:
Situation
Points A and G are collinear and
point H is non-collinear to points
A and G.
Sketch the situation
Points X and Y are non-coplanar to
line AB
Homework
Sketch an example of each of the following.
1. line AB
2. CF
3. Coplanar and non-collinear Points D, G, and H
Use the figure below to answer questions #4-5
Why is it correct?
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
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4. Use proper notation to name;
a) 3 collinear points
b) 2 non-collinear points to line DG
5. Use proper notation to name;
a) 4 coplanar points
b) 4 non-coplanar points
Exit Ticket
Concept 1. Points, Lines, Planes, part 2
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