1TH/V Ch1 SOLIDS

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• Middelbare school
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• Leerjaar 1

Ch 2 SOLIDS

Task 1: What makes something a SOLID?

Task 2: What is the 'red herring'?

1. a cut out
2. a pyramid
3. a map
4. a net

Task 2, Explanation:

A pyramid is a 3D thing, all others are flat (2D).

Task 3:
A top view is an example of an elevation.

1. true
2. false

Task 4:
How many faces does a pyramid have?

Task 4, explanation:

 Pyramids can have different numbers of faces! 

just watch the next slide!

Task 5: For these elevations you need at least .. cubes.

Key in your answer in the next slide.

You need .. slides.

1. 5
2. 7
3. 6
4. 4

Solution Task 5: For these elevations you need at least 6 cubes!

Let's add them up:

All 4 places in the TOP view need at

least one cube. But except for one place 

that has three cubes!- there can only be 

one cube. So:  1 + 1 + 1 + 3 = 6 cubes. 

Task 6:
How many cubes
have been used here?

1. 12
2. 14
3. 11
4. 13

Task 7: How many cm of wire do you need to make a wire model of this solid? (Key in in next slide.)

I need ... cm of wire.

Task 7, explanation:

Task 8: A cute cube means in dutch .....

Explanation Task 8:

A cute cube is:  een schattige kubus!

Task 9:

In the next slide you see 2 pyramids.

What is the difference in the number of edges between them?

Task 9: The difference in number of edges is:

1. 1
2. 4
3. 2
4. 3

Task 9, explanation:

The difference in number of edges is:

8 - 6 = 2 edges.

Task 10:

Watch the nets in the next slide.

What could you make of them?

Key in, in the next slide.

The solid you can make is .....

Task 10, explanation:

The solid you can make of both is a PYRAMID.

If this is not clear to you, look back at exercise 11 on page 25!

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Homework:

§2.6 Mixed exercises