# 2D-shapes

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Slide 1: Tekstslide
WiskundeMiddelbare schoolhavoLeerjaar 1

In deze les zitten 11 slides, met interactieve quizzen en tekstslides.

## Onderdelen in deze les

#### Slide 1 -Tekstslide

What is the name of the red shape shown before?
A
Rectangle
B
Triangle
C
Circle
D
Pentagon

#### Slide 2 -Quizvraag

2D-shapes
Shapes have vertices
(shown as the blue dots in the figure)
and
Shapes have sides
(the line segments between the vertices)

#### Slide 3 -Tekstslide

2D-shapes
A 2D-shape with 3 vertices and 3 sides is
called a triangle.
On the right you see triangle ABC,
named after the vertices A, B and C.

#### Slide 4 -Tekstslide

2D-shapes
If a 2D-shape has 4 vertices and 4 sides, we call it a quadrilateral. The most known quadrilateral is the square. But there are many others, as you will learn soon!

#### Slide 6 -Tekstslide

We are going to categorize the quadrilaterals based on the following properties:
• Parallel sides
• angles
• length of sides
Tekst

#### Slide 7 -Tekstslide

Trapezium
the trapezium.
It has 1 pair of parallel sides.
As indicated by the red sides in the figures.

#### Slide 8 -Tekstslide

How many vertices does a quadrilateral have?
A
3
B
4
C
5
D
6

#### Slide 9 -Quizvraag

How many sides does a triangle have?
A
3
B
4
C
5
D
6

#### Slide 10 -Quizvraag

Which property does a trapezium have?
A
1 pair of parallel sides
B
2 pairs of parallel sides
C
Equal angles
D
Equal sides