Area and the box method

Welcome to maths
Need: 
  • Book open on p. 123 (you can start with 37 and 38)
  • Notebook open on an empty page (with a margin)
  • Pen 
  • Pencil (+sharpener and eraser)
  • Geo triangle

2mm + 0.2dm + 3hm = .....m.
Question by a student :-) 
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Slide 1: Diapositive
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

Cette leçon contient 10 diapositives, avec quiz interactifs et diapositives de texte.

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Éléments de cette leçon

Welcome to maths
Need: 
  • Book open on p. 123 (you can start with 37 and 38)
  • Notebook open on an empty page (with a margin)
  • Pen 
  • Pencil (+sharpener and eraser)
  • Geo triangle

2mm + 0.2dm + 3hm = .....m.
Question by a student :-) 

Slide 1 - Diapositive

 Did you check your homework?
Yes? Start with ex. 37 and 38 on p. 115
No? first check and correct your homework
base = basis
height = hoogte
opposite = ertegenover liggend

Do you remember the words
line segment, perpendicular, vertex, arms, obtuse/acute?

Slide 2 - Diapositive

Goal
  • Know what an area is and how to calculate an area 
  • Write down calculations in a short and formal way
  • Check your work 

Slide 3 - Diapositive

Which formula do you use for
calculating the area of a triangle?

Slide 4 - Carte mentale

Calculate the area of this triangle and share your workings.


Slide 5 - Question ouverte

Calculate the area of triangle ABC (copy figure in notebook).

- Calculate the area of the rectangle.
- Calculate the areas of triangle I, II and III
- Area rectangle - area of the triangles = area triangle ABC


Slide 6 - Question ouverte

Calculate the area of triangle PQR and add a picture.


- Done? Continue with 37, 38 and 39 on p. 123


timer
6:00

Slide 7 - Question ouverte

Convert.
a. 750 dm^2 = ..... mm^2
b. 20 000 dam^2 = ...... km^2
Extra:
c. 8 100 mm^2 = ..........dam^2
Answer like this : 
75 / 12 / 81

Slide 8 - Question ouverte

Work on...
  • exercises 37, 38, 39 (and 40) on p. 123
  • Check your work after 8 minutes with a different colour
  • Copy HW in your planner
  • HW Thursday: Do ex. 37, 38 and 39 p. 123

timer
8:00

Slide 9 - Diapositive

Next lesson
  • You have finished and checked your homework 
  • HW Thursday: Do ex. 37, 38 and 39 p. 123
  • We will work on the properties of a circle

Slide 10 - Diapositive