Bai tap gui chi THANH

Development and consolidation.
Exercise 1. Look at examples and make similar statements about the following.
Example:
• A square is a kind of rectangle, but not all rectangles are squares.
• A right-angled triangle is a kind of triangle, but not all triangles are right-angled.
a) rhombus; parallelogram
b) parallelogram; trapezium
c) isosceles triangle; triangle
d) isosceles triangle; equilateral triangle
e) rectangle ; plane figure
Exercise 2. Read the passages below and then complete the following sentences
• All the sides of an equilateral triangle are equal, and so are those of a rhombus
• Opposite sides of a parallelogram are parallel and so are those of a regular hexagon.
a) Opposite sides of a rectangle are equal, and so are ......
b) All the angles of a square are right angles, and so are ......
c) All the sides of a regular hexagon are equal, and so are ......
d) All the sides of an equilateral triangle ......
e) All the angles of an equilateral triangle......
Exercise 3. Read and fill the gaps with the correct words.
In plane geometry an angle is a(6) ........................... that is formed by two (7)........................... lines that meet at a point. The lines of an angle are called the (8)............................ The point where they meet is called the (9)............................... When the sides of an angle are (10)............................... to each other, they form a right angle. A right angle (11)................................ ninety degrees. An angle of less than 900 is (12)........................... acute angle, and an angle of more than 900 but less than 1800 is an (13)........................... angle. An angle of more than 1800 is a (14).................................. angle.
Exercise 4. Read and fill the gaps with the correct words.
The Circle
A circle is a plane (1) … figure. The side of a circle is (2)… the circumference. All the points on the (3)… of a circle are equidistant from the (4)... A straight line which is drawn from the (5)… of a circle to (6)… circumference is called a (7)… All the radii of a circle are equal. The area between two radii is called a (8)…. A straight line drawn between one part of the circumference and another is known as a (9)…. A chord (10)… a circle into two (11)… and the circumference into two arcs. A chord (12)… passes through the centre of a circle is called a diameter.




Review lesson
Complete the following sentences, then translate them into Vietnamese.
1. Any angle that measures between zero degree and ninety degrees is called … …..
2. A segment in a quadrilateral that is perpendicular to both bases, with endpoints on the base lines is called ..................................
4. The parallel sides of a trapezoid are called ........ …………………..
5. The middle point of a circle or sphere is called ........ ……………………..
6. ............. is the set of all points in a plane that are the same distance from a given point called the center.
7. The distance around a circle is called ............. …..
8. Angles that hold the same position on two different parallel lines cut by a transversal (đường ngang) are called ........ . ……..
9. The distance across a circle through its center is called …………………….
10. A triangle that has three congruent sides is called an …………………………
11. The distance from the center of a circle to any point on the circle is called ... …….
12. The length of the altitude of a quadrilateral is called the …………………………….
13. In a right triangle, the side opposite the right angle is called the ... ……………………
14. A triangle that has two congruent sides is called an ..... ………………………..
15. Any angle that measures between 900 and 1800 is called ………………………….
16. Lines that are in the same plane but do not intersect are called .... …………………………
17. A quadrilateral that has both pairs of opposite sides parallel is called ……………………
18 The distance around a geometric figure is called ... …………………………
19. One of the four regions into which two perpendicular number lines separate a plane is called .... …………………………………….
20 A parallelogram with all angles congruent is a ……………………………
21. A parallelogram that has four congruent sides is called .... …………………………….
22. An angle that measures exactly ninety degrees is a ... ………………………………
23. A triangle with no congruent sides is often called a ……………………….)
24. ...........that have the same shape but may differ in size are similar.
25. Figures that can be folded into two identical parts are called ………………………………
26. A quadrilateral with exactly two parallel sides is a .... ………………………………….
27. The .............. of a pyramid is the point where all the faces except the base intersect. .
Đề kiểm tra học trình

I. Phần bắt buộc.
Đọc và điền từ thích hợp vào các câu sau