3Tvwo/havo Ch6 REFRESH

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

New Chapter, new Refresh:

Homework:

Ch 6 Trigonometry,

+ REFRESH, p.190/191

+ §6.1 only exercise 1

How was the Theorem of Pythagoras again?

See next slide!

Homework time.

Do the Refresh, p.190/191 now.

In 10 minutes we will do R3 -a bit more difficult- together.

+ Time to do R3 together. Although not simple, it was 2nd Form stuff too! 
+ Write down what we do now, in your Notebook.

+ Time to do R3 together. Although not simple, it was 2nd Form stuff too! 
+ Write down what we do now, in your Notebook.

+  How to find the length of BD (the longest diagonal!)?

+  You need to work in a certain face of the cuboid!

+  Try to decide which face!

                                              -See next slide-

So, the face is:    the base, rectangle ABCD! 

Once more do R3a:

Calculate length BD!

Use the Pythagoras Scheme, given in exercise R3a!

The solution follows soon.

The Solution to R3a:

Try yourself now.

Answer follows.

By the way: what was 'the exact answer to question a'?

That was:   

BD=√​500​​​

Now comes the critical thing:

how to calculate 'the longest diagonal' in the cuboid: DF ?

Try it yourself first!

Solution coming up - get ready!

New Chapter, new Refresh:

Homework:                                          

Ch 6 Trigonometry,

+ REFRESH, p.190/191

+ §6.1 only exercise 1