TTO1 CH1 ls1: lines, lines of vision, right angles, perpendicular and parallel lines

TTO1 CH1 lines, lines of vision, right angles, perpendicular and parallel lines
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WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

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TTO1 CH1 lines, lines of vision, right angles, perpendicular and parallel lines

Slide 1 - Diapositive

Cet élément n'a pas d'instructions

Start assignment
Get your Ipad (closed on the corner of your desk), notebook, pencil case, protractor triangle & compass
1) Join the lessonup
2) Make the excersise in your notebook: 
Draw a...
a) ...rectangle
b) ...square
c) ...circle

timer
1:00

Slide 2 - Diapositive

Cet élément n'a pas d'instructions

Program:
Today I'll learn... 
...what the difference is between lines, rays and line segments
...how to use a line of vision
...recognising right angles
...recognising parallel and perpendicular lines
  • Start assignment (5 minutes)
  • Introduction chapter 1 (5 minutes)
  • Instruction (10 minutes)
  • Bettermarks (15 minutes)
  • Working on your glossary (10 minutes)
  • Evaluation (5 minutes)

Slide 3 - Diapositive

Cet élément n'a pas d'instructions

Introduction chapter 1
--> bettermarks introduction

Slide 4 - Diapositive

Cet élément n'a pas d'instructions

Instruction (1)
  1. Point: labeled with capital letter
  2. Line segment: shortest path between two points. It has two endpoints.
  3. Ray (or half line): a line with one endpoint
  4. Line: no endpoints.  You can extend both ends to infinity

Slide 5 - Diapositive

Cet élément n'a pas d'instructions

This is a...
A
line segment
B
line
C
ray

Slide 6 - Quiz

Cet élément n'a pas d'instructions

This is a...
A
line segment
B
line
C
ray

Slide 7 - Quiz

Cet élément n'a pas d'instructions

this is a...
A
line segment
B
line
C
ray

Slide 8 - Quiz

Cet élément n'a pas d'instructions

A line segment ...
A
has no beginning and no end
B
has a beginning
C
has an end
D
has a beginning and an end

Slide 9 - Quiz

Cet élément n'a pas d'instructions

Which word applies to the following definition :

A line with only one begin point and no end point
A
Edge
B
Line segment
C
Line
D
Half line

Slide 10 - Quiz

Cet élément n'a pas d'instructions

Instruction (2)
  • A ⁣line of vision⁣ is a ⁣ray⁣ drawn from the point of view of a person.
  • If we want to know if a person is able to see a certain object, we draw a line of vision from this person to that object. If the line is not hindered by obstacles, the person can see the object.
  • Range of view: how many beach chair can this person see?


Slide 11 - Diapositive

Cet élément n'a pas d'instructions

How many trees is this person able to see?
A
1
B
2
C
3
D
4

Slide 12 - Quiz

Cet élément n'a pas d'instructions

Instruction (3)
A right angle is ⁣90 °⁣ (pronounced ⁣“90 ⁣degrees”). The symbol for a right angle is a small square drawn inside the angle:

Recognise a right angle
you can the square of your protractor triangle to recognise a right angle

Slide 13 - Diapositive

Cet élément n'a pas d'instructions

How many degrees is a right angle ?
A
60 degrees
B
120 degrees
C
90 degrees
D
45 degrees

Slide 14 - Quiz

Cet élément n'a pas d'instructions

Where do you see a right angle?
A
B
C
D

Slide 15 - Quiz

Cet élément n'a pas d'instructions

Instruction (4)
Parallel & Perpendicular:
  1. Parallel: lines keep the same distance from each other at all points, lines never intersect
  2. Perpendicular: Two lines (or rays or segments) are ⁣perpendicular⁣ to each other if they form a ⁣right angle.

Slide 16 - Diapositive

Cet élément n'a pas d'instructions

Instruction (5): Draw perpendicular & parallel lines
ppt

Slide 17 - Diapositive

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Cet élément n'a pas d'instructions

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Cet élément n'a pas d'instructions

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Cet élément n'a pas d'instructions

Slide 22 - Diapositive

Cet élément n'a pas d'instructions

Slide 23 - Diapositive

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Slide 24 - Diapositive

Cet élément n'a pas d'instructions

Bettermarks
Make: 1.1, 1.2, 1.3, 1.4

Done? 
You can choose:
- Homework other subject
- Play Cross Math on your ipad (next monday we'll check: who have the most points?)

Slide 25 - Diapositive

Cet élément n'a pas d'instructions

Glossary
Words you have to know:
  • Line
  • line segment
  • ray
  • Line of vision
  • Right angle
  • Parallel
  • perpendicular


Think
Can you explain all of these words?
Pair
Discuss in pairs: check your definitions of the words with each other
Share

Slide 26 - Diapositive

Think, pair, share
Evaluation
Homework before monday:
Make: 1.1, 1.2, 1.3, 1.4
Exitticket:
Write down and make a drawing:
a) Line
b) Line segment
c) Ray (half line)

Today I'll learn... 
...what the difference is between lines, rays and line segments
...how to use a line of vision
...recognising right angles
...recognising parallel and perpendicular lines

Slide 27 - Diapositive

For example: you want to repaper the walls of your room, you calculate you need 5.2 rolls of wallpaper. In this case you havo to round up to 6 rolls of wallpaper, otherwise you wouldn't be able to finish you entire room.