Презентация "Плоские и объемные геометрические фигуры"


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Тема: Основные геометрические понятия и

Тема: плоские и объемные геометрические фигуры (2 ч)

Цель урока: студенты смогут использовать в речи названия геометрических фигур и их измерения.

Study this scheme.

Match the words and the geometrical figures.

.

) .

1)

3)

2)

4)

7)

5)

6)

8)

9)

10)

11)

12)

a curve a straight line a triangle

an angle a square a trapezium

a circle a rectangle a point

an oval a parallelogram a rhombus

Name these objects and then

their shapes accordingly the example.

The dimensions and the ways of asking and saying them.

What's the length of this parallelogram?

How long is this parallelogram? -

The length of this parallelogram is 5 cm.

 

What's the width of this parallelogram?

How wide is this parallelogram? -

The width of this parallelogram is 3 cm.

What's the height of this triangle?

How high is this triangle? -

The height of this triangle is 4 cm.

 

What's the length of this triangle base?

How long is this triangle base? -

The length of this triangle base is 7 cm.

The dimensions and the ways of asking and saying them.

The radius of this circle is 2.5 cm.

The diameter of this circle is 5 cm.

What?

r – radius

d - diameter

Say the dimensions of these figures.

5 cm

25 mm

3 m

7 cm

3 m

1 km

0.5 km

25 mm

5 cm

Ask and say the dimensions of the object.

Ask and say the dimensions of the object.

Ask and say the dimensions of the object.

Solid figures.

Prism

The dimensions of solid figures.

Say the dimensions of the object.

Compare the sizes of these figures.

1) a =5 cm; b=3 cm 2) a=4 cm; b=3 cm

1) a =4 cm 2) a=5 cm

1) r =10 m 2) r=12 m

1) a =3 cm; b=6 cm; c=5 cm 2) a=4 cm; b=4 cm; c=4 cm

Compare the sizes of these figures.

a =5 cm b=8 cm c=7 cm

1=30º 2=50º 3=40º

1

b

c

a

2

3

1

2

3

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