Area of a rectangle and triangle

Welcome to maths
Need: 
  • Book open on p. 119
  • Notebook open on an empty page (with a margin)
  • Pen 
  • Pencil (+sharpener and eraser)
  • Geo triangle

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volgende
Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 11 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 45 min

Onderdelen in deze les

Welcome to maths
Need: 
  • Book open on p. 119
  • Notebook open on an empty page (with a margin)
  • Pen 
  • Pencil (+sharpener and eraser)
  • Geo triangle

Slide 1 - Tekstslide

 Did you check your homework?
Yes? Start with ex. 25 and 27 on p. 115
No? first check and correct your homework
perimeter = omtrek 
area = oppervlakte
shape = figuur
to express = uitdrukken
timer
6:00

Slide 2 - Tekstslide

Goal
  • Repeat §1 and §2
  • 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 - Tekstslide

Make your own short question about §1 and/or §2.
For instance:
'Calculate the area of a rectangle of 20 cm by 30 dm in m^2.'
Or 'Convert 10.3 hours to minutes.'

Slide 4 - Woordweb

Calculate the area of this triangle and share your workings.

- Area of a triangle =
- What is the base?
- Whats is the height?

21baseheight

Slide 5 - Open vraag

Calculate the area of triangle DEF and share your workings.

- Area of a triangle =
- What is the base?
- Whats is the height?

21baseheight

Slide 6 - Open vraag

Convert.
a. 75 cm^2 = ..... mm^2
b. 120 000 cm^2 = ...... m^2
Extra:
c. 810 mm^2 = ..........dm^2
Answer like this : 
75 / 12 / 81

Slide 7 - Open vraag

Next slide
  •  Make an right angled triangle
  • Make an acute triangle
  • Make an obtuse triangle

Per triangle: find the right height and show your neighbor or teacher

Slide 8 - Tekstslide

Slide 9 - Link

Work on...
  • exercises 34 utai 36 on p. 123
  • Check your work after 8 minutes with a different colour
  • Copy HW in your planner
  • HW: Do ex. 25, 27 and 34 utai 36  on p. 119 and p. 123

timer
8:00

Slide 10 - Tekstslide

Next lesson
  • You have finished and checked your homework 
  • HW: Do ex. 25, 27 and 34 utai 36 on p. 119 and p. 123
  • We will work on area and 'The box method'

Slide 11 - Tekstslide