Angles

Good morning!
Schedule: 
  • Learning goals 
  • Worksheet check
  • Angles
  • Angle notation
  • Measuring angles
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Slide 1: Diapositive
WiskundeMiddelbare schoolvwoLeerjaar 2

Cette leçon contient 17 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.

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Good morning!
Schedule: 
  • Learning goals 
  • Worksheet check
  • Angles
  • Angle notation
  • Measuring angles

Slide 1 - Diapositive

Learning goals 
At the end of this lessons I can:
  • Identify different kinds of angles
  • Use the correct notation when working with angles
  • Measure angles with my protractor/geotriangle 

Slide 2 - Diapositive

What different kinds of angles are there?

Slide 3 - Carte mentale

Acute angle
Right angle
Obtuse angle
Revolution
Reflex angle
Straight angle

Slide 4 - Question de remorquage

90°
Between 0° and 90°
Between 90° and 180°
180°
Between 180 and 360°
360°

Slide 5 - Question de remorquage

Slide 6 - Diapositive

Angle notation
Three point notation: You refer to angles using a point on each arm and the vertex between them


Slide 7 - Diapositive

Angle notation
Three point notation: You refer to angles using a point on each arm and the vertex between them


Arms

Slide 8 - Diapositive

Angle notation
Three point notation: You refer to angles using a point on each arm and the vertex between them


Green angle notation : 

Blue angle notation : 

Red angle notation : 

Slide 9 - Diapositive

Angle notation
Three point notation: You refer to angles using a point on each arm and the vertex between them


Green angle notation : 
ADB        or                BDA
Blue angle notation : 
BDC        or                CDB
Red angle notation : 
Reflex ADC
_
_
_
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You put a line over the vertex of the angle

Slide 10 - Diapositive

Angle notation
Three point notation: You refer to angles using a point on each arm and the vertex between them


Other notations you might come across: 
∠ADB           ∠BDA
Other notations you might come across: 
∠BDC          ∠CDB
Other notations you might come across:
Reflex  of ∠ADC           reflex of ∠CDA

Slide 11 - Diapositive

Book 
Open your book and take 10 min to finish: 

P. 48              3B:  1, 2

Done? 
P. 49                  3B: 3
Open this LessonUp and work on slide 14

Slide 12 - Diapositive

Challenge

Slide 13 - Diapositive

Challenge
Reflex ∠RQP         Reflex ∠XYZ         Reflex ∠ABC
Reflex ∠PQR         Reflex ∠ZYX         Reflex ∠CBA

Slide 14 - Diapositive

Measuring angles
1. What kind of angle is it? What amount of degrees could it be? 
(Ex. An acute angle MUST be between 0° and 90°)
2. Measure with your protractor or geotriangle
3. Check: does my measurement make sense with step 1? 

Slide 15 - Diapositive

Slide 16 - Vidéo

Measuring and coloring !
Ask for a worksheet from the supervisor!

(This is homework for next Monday 27-3)

Slide 17 - Diapositive