Работа с текстом ‘Geometric Solids’. На основе текста выполнить два задания.
We have been studying plane figures which have only two dimensions; length and width. Now we will study figures with three dimensions. Figures that have three dimensions are called geometric solids or solid figures. The three dimensions are length, width and thickness or height.
PRISMS.A prism is a solid, each side of which is a polygon, and the upper base of which is parallel and congruent (exactly the same in size and shape) to the lower base; corresponding vertexes of the top and bottom polygons are joined by parallel edges. In a right prism the lateral faces (sides) are perpendicular to the bases.
Right prisms include; the rectangular prism and the cube. A geometric figure which has six sides, all of which are rectangles, is called a rectangular prism. If the dimensions (length, width and height) of a rectangular solid are equal, the solid is called a cube. The faces of a cube are squares.
THE RIGHT CIRCULAR CYLINDER.A cylinder is a circular prism, the bases of which are equal circles that are parallel to each other. If the sides of the cylinder are perpendicular to the bases, the cylinder is called a right cylinder. The axis of a right circular cylinder is the line between the centres of the bases.
A PYRAMID. It is a solid figure formed by a polygon called the base and sizes of triangles meeting at a common point called the vertex.
A CONE is much like a pyramid but has a circle for a base.
Задания к тексту:
1.Answer the following questions:
What geometric figures have three dimensions?
What are the dimensions of solid figures?
What geometric solids do you know?
What cylinder is called a right cylinder?
What is a pyramid?
2.Выбрать правильный вариант ответа
How many dimensions has the cube?
a] 3;
b] 1;
c] 2;
d] 0.
How many dimensions has the sphere?
a] 0;
b] 1;
c] 3;
d] 2.
How many bases has a cylinder?
a] 0;
b] 1;
c] 2;
d] 3.
How many bases has a cone?
a] 0;
b] 1;
c] 2;
d] 3.
How many bases has a sphere?
a] 1;
b] 0;
c] 2;
d ] 3.
How many edges has a cylinder?
a] o;
b] 1;
c] 2;
d] 3.
How many edges has a triangle pyramid?
a] 5;
b] 6;
c] 8;
d] 4.
How many edges has a parallelepiped?
a] 10;
b] 8;
c] 3;
d] 6.
How many vertexes has a cone?
a] 1;
b] 5;
c] 7;
d] 8.
How many vertexes has a cube?
a] 8;
b] 6;
c] 4;
d] 2.
How many vertexes has a parallelepiped?
a] 3;
b] 5;
c] 6;
d] 8.
2) Much of the equipment in the office needs updating.
3) A car is a means of transport.
4) How many cigarettes do you smoke a day?
5) When I got to the theatre, they were already playing the second act.
6) Unusual facts, marvels are called phenomena.
7) The brown sweater is the best.
8) That was the most interesting movie I have ever seen.
9) Uncle Carl is really a sweet old man.
10) Which is the longest river, the Dnipro or the Dnister?
11) Fanny can sew dresses so well.
12) Taras drives dangerously.
13) Those apples look delicious. May I have one?
14) She often sneaks out of the house quietly.
15) I absolutely refuse to stay here any longer.