Shapes

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Shapes

The shapes on the first slide have a name. 

Do you know them?

triangle

circle

square

rectangle

How could you tell these shapes apart?

Properties

The numbers of angles, the length of the sides (compared to each other), the size of the angles.......

These are called the properties of a shape.

The colour and how big they are, are NOT properties in maths. 

Let us do a quizz

You will get a description and you write what shape it is.

What am I?
I have 4 sides, I have 4 angles, I have two shortes sides and two longer sides.

What am I?
All my sides are equally as long (= even lang), I have three angles and three sides.

What am I?
I have 1 curved side.
I have no angles

What am I?
I have 4 angles and 4 sides.
All sides have the same length.

What is a net?

Draw ABC with AB= 4 cm, BC = 3 cm and AC = 6 cm.

What are the numbers 12 and 3 called in the sum 12 + 3?

The ... of 28 and 7 is 28 + 7 = 4.

In the order of operations, division comes .....…. working in the brackets and …...... substraction.

Before

After

The numbers 2½ and -2½ are each other's ....

quadrilaterals

names

1. square

2. rhombus

3. rectangle

4. trapezium (UK)  trapazoid (US)

5. parallellogram

6. arrowhead

1.

2.

3.

4.

5.

6.

Look at the picture. How many quadrilaterals do you see?

How many quadrilaterals did you see?

Look at the picture. How many squares do you see?

how many squares did you see

Look at the picture. How many trapeziums do you see?

how many trapeziums do you see?