Face diagonal and space diagonal

• Wiskunde
• Middelbare school
• havo
• Leerjaar 1

Make it ready on your table:

1. Notebook

2. Book

3. Pencil case with compass/ Etui

4. laptop(still close)

While waiting everyone to be settled:

Draw triangle ABC

AB=2.5 cm

AC= 1 cm

BC= 2 cm

Draw an octagon and find out how many diagonals you can draw with it.

Face diagonal and space diagonal

Learning objectives:

You can recognise face diagonals 

and space diagonals

face diagonal

is a diagonal of the flat face of a solid.

space diagonal

is a diagonal that goes right through a solid.

What for diagonal is the black line?

What for diagonal is the red line?

which line is space diagonal?

Which line is drawn as face diagonal?

Draw a cube in your notebook

Draw all possible space diagonals.

How many space diagonal has a cube?

Draw another cube on your notebook, draw all face diagonal possible.

How many face diagonal has a cube?

I know the difference between face and space diagonal.

1. no
2. yes

Homework time:

Do questions 66 and 68.