The mathematics exercises in the second volume of the seventh grade of Hebei Education Edition need to be divided into chapters.

2009-20 10 school year seventh grade mathematics midterm examination questions and answers.

First, multiple-choice questions (3 points for each question, ***30 points)

1, as shown in the figure, ∠ 1 and ∠2 are opposite.

2. As shown in the figure, lines A and B are cut by line C. Now, the following four conditions are given: ①∠ 1 =∞? 5;

②∠ 1=∠7; ③∠2=∠6; ④ ∠ 4+∠ 7 = 180. There are () conditions that can explain a ∨ b.

a、 1 B、2 C、3 D、4

Question 2, question 3

3. As shown in the figure, if AC∑ED, ∠ c = 26 and ∠ CBE = 37, then the degree of ∠BED is ()?

a、63b、83c、73d、53？

4. If point A (m, n) satisfies mn=0, then point A is in ().

A, origin b, coordinate axis c, x axis D y axis,

5. The line segment MN is obtained from the translation of the line segment EF. If point E(- 1, 3) corresponds to point M (2 2,5), then the coordinate of point N corresponding to point F (-3,2) is ().

a 、(- 1，0) B 、(-6，0) C 、( 0，-4) D 、( 0，0)

6. As shown in the figure, Chen Xiao started from point O, walked 5 meters and then turned right, walked 5 meters and then turned right ... and so on. When he first returned to the starting point O, he left ().

A, 60m b,100m

C, 120m D, 90m Question 6

7, known as an external angle of the isosceles triangle, then the vertex of the isosceles triangle is ().

A, b, c or d,

8, in the regular triangle, square, pentagon, hexagon can't separate mosaic plane is ().

A, regular triangle b, square c, regular pentagon d, regular hexagon

9. If one solution of equation AX-2Y = 4 is, then the value of a is ().

a 、- 1 B、3 C、 1 D 、-3

10, ... Observe the three numbers on the left in turn, and judge that the fourth number from left to right is () according to this rule.

A, B, C, D,

II. Fill in the blanks (3 points for each question, ***24 points)

1 1, as shown in the figure: ∠2=∠3, then _ _ _ _ _ _ _.

Question 1 1 question 12 question 16

12 As shown in the figure, fold a rectangular piece of paper ABCD in half along EF, and if ∠ EFG = 50, ∠ DEG = _ _ _ _ _ _ degrees.

13, the topic in the proposition "Equal Vertices" is _ _ _ _ _ _ _, and the conclusion is _ _ _ _ _ _ _.

14. given the AB∑x axis, the coordinate of point a is (3,2) and AB = 5, then the coordinate of point b is.

15. If two sides of a triangle are 2cm and 7cm respectively, and the third side is odd, then the circumference of the triangle is ___cm.

16, as shown in the figure: in △ABC, AD is the midline, so the area of △ Abd _ △ ACD (fill in ">").

17. If the equation 2x2m+3+3Y5n-9 = 4 is a binary linear equation about X and Y, then m2+N2 = _ _ _ _ _.

18, the torch of the 2008 Olympic Games will be passed in our province (the route is:

Kunming Lijiang-Shangri-La), Xiao Ming, a student of a school, is on the map of our province.

The coordinate of Lincang position point is (–1,0), torch.

The coordinates of the transmission starting point Kunming are (1, 1). As shown in the figure,

Please help Xiaoming determine the location of Shangri-La, the destination of the torch relay.

The coordinates of are _ _ _ _ _ _.

Iii. Answering questions (***66 points)

19, solving the equation: (5 points for each small question, *** 10)

( 1) (2)

20. As shown in the figure, you can get △DFE by translating △ABC, and the point corresponding to point C is point E. Please draw the translation.

Delta dfe (6 points)

2 1. If the sum of the inner angles of a polygon is equal to twice the sum of the outer angles, then the polygon is a polygon (8 points).

22. If A, B and C are three sides of △ABC, simplify (6 points).

23. in △ABC, ∠B=∠C=∠BAD, ∠ADC=∠DAC, find the degree of ∠ADC. (6 points)

24. As shown in the figure, the AB side and AC side of the straight line DE intersect △ABC at point D and point E, and intersect the extension line of BC at point F. If ∠ B = 67, ∠ ACB = 74, ∠ AED = 48, find the degree of ∠BDF. (8 points)

25. Known: DG⊥BC, AC⊥BC, EF⊥AB, ∠ 1=∠2.

Verification: CD⊥AB( 10 point)

26. Draw four points A (0 0,2), B (- 1 0), C (1,-1) and D (3, 1) in the plane rectangular coordinate system.

(1) Connect A, B, C and D in turn to form a quadrilateral ABCD, and find the area of the quadrilateral ABCD.

(2) If the quadrilateral ABCD is translated by 3 unit lengths to the left and by 1 unit length upward,

Find the coordinates and areas of each point of the translation quadrilateral. (12)

Reference answer

A multiple-choice question (3 points for each question, 30 points for * * *)

1、c； 2、D； 3、A； 4、B； 5、D； 6、D； 7、C； 8、C； 9、B； 10、D；

II. Fill in the blanks (3 points for each question, ***24 points)

1 1、AD‖BC； 12、 100; 13, and the two angles are diagonal; They are equal; 14, (-2,2) or (8,2);

15、 16; 16、=; 17、5; 18、(- 1,4);