13. Say whether you agree or disagree with the following descriptions.

1. T his is a triangle. It has three sides and 3 right angles.

2. This is a square. It has four equal parallel sides and four right angles.

3. This is a pentagon. It has no parallel sides, all the angles are acute.

4. This is a hexagon. It has three pairs of parallel sides; one of the angles is obtuse.

5. The sum of the angles of a triangle is 90°.

6. A n obtuse triangle has two obtuse angles.

14. Translate the following sentences from Ukrainian into English.

1. Яку форму має цей блок? – Він квадратний.

2. У квадратів чотири рівних сторони і чотири прямих кута.

3. Круги не мають кутів та сторін.

4. Ці предмети мають різні форми: квадратні, прямокутні, трикутні, круглі.

5. Ця стіна квадратна, чи не так? – Так, вона квадратна.

6. Цей трикутний предмет має рівні кути. – Ні, не зовсім.

7. Ці двері прямокутні чи квадратні? – Вони прямокутні.

Reading and Speaking

15. Read the text and learn how to describe geometrical figures and objects.

A. Look at the picture. These are different shapes. They are trian­gles, squares, rectangles and cir­cles.

T riangles have three sides and three angles. Squares and rectan­gles have four sides. Squares have four equal sides, but rectangles have two equal sides. Circles do not have angles or sides.

B. Look at the picture. These are different objects. This is a box, a wheel, a frame, a door and a pair of nails. They have different shapes. The box is square. The door is not square, it is rectangu­lar. The nails are circular. The wheel is circular too. The frame is triangular.

16. Answer the following questions.

A

1. What shapes are these?

2. Do triangles have three sides?

3. Do they have three angles?

4. Do squares have four or two equal sides?

5. Do rectangles have four equal sides?

6. Circles do not have angles or sides, do they?

B

1. Do these objects have different shapes?

2. What shape is the box?

3. Is the door square or rectangular?

4. Are the nails circular?

5. T he wheel is circular, isn't it?

6. What shape is the frame?

17. Complete the dialogues.

A

Paul: What are those?

Ann: ... shapes.

Paul: What... they?

Ann: They are triangles, and ....

Paul: Squares have ... sides and ... angles.

Ann: Triangles ... three ... and ... angles.

Paul: Yes

Ann: Rectangles have ... sides and four ....

Paul: Circles do not have ... or ... .

В

Alex: What's this?

Peter: ... a box.

Alex: What's the shape of the box? Is it circular?

Peter: No, ... is .... It is ....

Alex: What's that?

Peter: ... a wheel.

Alex: The wheel is .... isn't it?

Peter: Certainly.

18. Draw different shapes and ask your group mate to name and describe them.

19. Use the expressions of agreement and disagreement and describe these objects in pairs.

Begin like this:

- This is a triangle, isn't it?

• Absolutely right.

• It has three angles and two sides.

• No, you are wrong. It has three angles and three sides.

20. Complete the chart.

VOCABULARY

№	English word	Transcription	Translation
1.	calculation		обчислення
2.	point		точка
3.	line		лінія
4.	straight		пряма
5.	curve		крива
6.	circle		коло
7.	square		квадрат
8.	angle		кут
9.	acute angle		гострий кут
10.	obtuse angle		тупий кут
11.	right angle		прямий кут
12.	plane		площина
13.	parallel		паралельний
14.	triangle		трикутник
15.	rectangle		чотирикутник
16.	octagon		восьмикутник
17.	heptagon		семикутник
18.	hexagon		шестикутник
19.	pentagon		п’ятикутник
20.	decagon		десятикутник
21.	sphere		сфера
22.	cube		Куб
23.	oval		овал
24.	semi-circle		півкруг
25.	triangular		трикутний
26.	Rectangular		чотирикутний
27.	square		квадратний
28.	circular		круглий
29. 30.	cylindrical spherical		циліндричний сферичний