3Tvwo §8.5(A) and §10.5(B)

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 3

Math A: §8.5

Math B: §10.5

We start with a few question on WORDS taken from §8.5.

A challenge for the whole class!

After this a short Intro for Math B pupils only follows.

How good is your English? 

The question is about the word 'conducted'.

Does 'conducted' mean:

A.   are forbidden                         B.  are organized

C.   are carried out                       D.   are strongly advised

Key in, in next slide!

.......... are conducted ........... means:

1. are forbidden
2. are organized
3. are carried out
4. are strongly advised

This question is about the word 'the'.

I was just pulling your leg.

The question is about the word 'correlation', of course!

Does it mean:

A.   in relation to Cor                B.   mutual relationship

C.   relation                                   D.   the contrary to relation

Key in, in next slide!

correlation means ....

1. in relation to Cor
2. mutual relationship
3. relation
4. the contrary to relation

Does it mean:

A.    a sportscar               B.    a wing sitting on your lap

C.   a bird                            D.   a special wing of an aeroplane

lapwing means .......

1. a sportscar
2. a wing sitting on your lap
3. a bird
4. a special wing of an aeroplane

What does this mean?!

a.   a bizar graph                 b.   een 'spreidingsgrafiek'

c.   a smooth graph           d. a graph with a zigzag

a scatter graph means .....

1. a bizar graph
2. 'een spreidingsgrafiek'
3. a smooth graph
4. a graph with a zigzag

Scoring some points and reflecting on words

may have been funny, but ....

it is intended to help you - Math A pupils- on your way, when doing 

§8.5, not being held up by unknown words.

Now Math B students, a few slides on § 10.5!

They include visual questions.

What special lines for triangles are used here?

Open your book and look it up, if you need to!

a.   perpendicular bisectors     b.   altitudes

c.   angle bisectors                       d.   diagonals

Fill in, in next slide!

The special lines are .....

1. perpendicular bisectors
2. altitudes
3. angle bisectors
4. diagonals

The special lines for triangles, used here, are:

a.   altitudes       b.   perpendicular bisectors

c.   diagonals     d.   angle bisectors

Special lines here are ...

1. altitudes
2. perpendicular bisectors
3. diagonals
4. angle bisectors

Finally, just a few remarks ...

! Watch the word 'construct' in 36a. The 'incircle' (meaning simply the circle inside the triangle) should not be drawn 'by intuition', but like this:

+ using your compasses and

+ using the same method that you used for exercise 35, where you were guided, step by step.

   If you do not understand yet, study the endresult in the Solutionsbook and you will know how! 

This exercise is a great Challenge for you, although it is not a C -exercise!

It contains:

+  many 'drawing' tasks, to be carried out accurately (no compasses needed).

+ several 'explain' tasks, like 'd' and 'h'. 

+ however, if you are able to find out exercise '38 i' by yourself, you are ready for Math B!!

Homework: