People's education edition, seventh grade mathematics volume 2, final exam questions 1. Multiple-choice questions (*** 10, 3 points for each question, out of 30 points. Each of the following questions gives four options: A, B, C and D, and only one option is correct. Please fill in the serial number of the correct answer in the table below.
The title is 1 23455 6789 10.
answer
1, the following calculation is correct.
A, B,
C, D,
2, the following can't be established is
a 、( x =x B、x
c 、( x D、x
3. Fold the corner of △ABC as shown in the figure, if? 1+? 2 = 120? , the degree is
60? b、65？ c、50？ d、55？
4. Figure 4 is the logo pattern of Volkswagen, which contains a lot of geometric knowledge.
Complete the certification according to the following conditions.
Known: as shown in Figure 4. If, then the degree is.
60? b、30？ c、40？ d、45？
5. As shown in the figure, in △ABC, d and e are points on AC and BC respectively. if
△ ADB △ EDB △ EDC, and then what? The degree of c is
A. 15？ B.20？ C.25？ D.30？
6, with the following groups of data as the length of three line segments, can form a triangle is
A.. 1，4，3 C 1，2，3d 2，7，3
7. There are four automobile Peugeot patterns below, among which there are axisymmetric patterns.
1。
8. The following statement is correct
A. If something can't happen, it is an inevitable event, that is, the probability of occurrence is1;
B. the probability of an unlikely event is not 0.
C. if something is sure to happen, the probability of it happening;
D. things with high probability are bound to happen;
9. As shown in the figure, water is injected into a cylindrical empty cup with a height of h, and the image showing the relationship between water injection quantity Y and water depth X is as follows
a，0.7 B，0.8 C，0.9 D，0.6
10, as shown in the figure,, points move on the ray respectively, and are divided equally.
The inverse extension line of and the bisector of intersect at this point. After moving, the degree is.
A, B, C, D,
Drawing 10 drawing 13
Scoring reviewer
Fill in the blanks (this big question is ***6 small questions, each with 3 points, *** 18 points. Please fill in the answer at the beginning of the line).
1 1, called completely flat mode, then the value of k is
12、 ( )- 1+(3-? )0=______
13, as shown in figure,? In ABC, the perpendicular line of AB intersects with AC at point M..
If CM=3, BC=4, AM=5,
then what The circumference of MBC = _ _ _ _ _. .
14, as shown in figure,? At ABC, A=74O, d is higher than BC,
After point D, draw DE∨AC at point E and DF∨AB at point F, and then
? EDF= O
1 5. As shown in figure 1, it is known to be a point on the angular bisector, connected,; As shown in Figure 2, it is known that two points on the bisector are connected. As shown in Figure 3, it is known that,, and are three points on the angular bisector, connecting,,,; Conversely, the logarithm of congruent triangles in the first picture is
Map number 15
16. If the kitten walks freely on the floor as shown,
And stay on a square brick at will, and finally stay on a black square brick.
The probability is; Each square brick in the picture is exactly the same except the color.
Scoring reviewer
Three. Solution: Write the necessary text description, proof process or calculation steps when solving the problem (***52 points).
17, (6 points) known, find the value of algebraic expression.
18.(8 points) Two congruent triangles can spell out various shapes. As shown in the picture, a triangle is drawn. Please draw another congruent triangle separately, so that each shape becomes a different axisymmetric shape (the drawn triangle can overlap the original triangle). How many kinds can you design at most? (At least four designs)
19.(6 points) As shown in the figure, those angles can be measured by judging whether AB is parallel to CD; Please write down three schemes and explain the reasons. e
A b
C D
20.(8 points), the supermarket will hold a prize promotion activity: anyone who buys 300 yuan once can get it.
Chance of winning the prize. The lottery machine is a circular turntable, which is divided into 16 equal parts.
Red, yellow and blue won the first, second and third prizes, with prizes of 60, 50,
40 yuan. Those who make a one-time shopping trip to 300 yuan can return 15 yuan cash if they don't win the prize.
(1) What is the probability of winning the first prize at a time?
(2) Lao Li's one-time shopping in 300 yuan is cost-effective.
Getting 15 yuan cash is still very cost-effective. Please help him calculate.
2 1.( 12 minutes) It is known that the moving point P moves along the boundary of Figure A at a speed of 2cm per second along the path from B C D E F A. The relationship between the area S corresponding to △ABP and time T is shown in Figure B. If AB=6cm, try to answer the following questions:
(1) What is the length of BC in Figure A?
(2) What is A in Figure B?
(3) What is the graphic area in Figure A?
(4) What is B in Figure B?
22.( 12 points), as shown in the figure, in the quadrilateral ABCD,? ABC+？ D= 180？ , communication split? No, e is a point on the extension line of AB, but what about CE? AE，CF？ AD，
Description: (1) △ CBE △ CDF;
(2)AB+AD=2AF。
People's education printing plate seventh grade mathematics volume two final exam reference answer 1. Multiple choice questions: 1. C2 d . 3 . a4 . D5 . D6 . a7 . c8 . B9 . a 10 . b
Fill in the blanks: 1 1. + 1? 112.413.12cm 14.74 degrees.
Third, answer questions.
17, solution: original formula =4? 12+9+.......................... 1.
=3 ? 12 +9
= ? .4 points
? =1......................... 5 points.
? Original formula = 3 (1+3) =12 ............................ 6 points.
18. Solution: Draw one correctly and give 2 points.
19、( 1)? EAB=？ c； The same angle is equal and two straight lines are parallel.
(2)? Bad =? d； Internal dislocation angles are equal and two straight lines are parallel.
(3)? BAC+？ C= 180？ ; Two lines with complementary internal angles are parallel. 1 gives 2 points, and all pairs give 6 points.
20、( 1) = , ? .. 3 points
(2) 60? +50? +40? =20 6 points
20﹥ 15 ? Choose lottery tickets. ? .8 points
2 1. Solution: (1) When the moving point P moves on BC, the corresponding time is 0 to 4 seconds, and it is easy to get: BC=2cm/ s? 4 seconds = 8cm
Therefore, the length of BC in Figure A is 8 cm. ............................. is two points.
(2) From (1), BC=8cm, then: a=? BC? AB = 24cm2 A in Figure B is 24cm2 ... four minutes.
(3) From the figure, we can see that CD=2? 2=4cm，DE=2？ 3=6cm, then AF=BC+DE= 14cm, ... 6 points.
And from AB=6cm, the area of figure a is AB? AF﹣CD？ DE=60cm2，
The graphic area in Figure A is 60 cm2...8 minutes.
(4) According to the meaning of the question, the moving point P*** moves:
BC+CD+DE+EF+FA = 8+4+6+2+ 14 = 34cm，......................... 10.
When its speed is 2cm/ s, then b= = 17 seconds, and b in figure b is 17 seconds. 12 point
22.( 1)∵ AC split? Not good, CE? AE，CF？ advertisement
? CE=CF？ . 1 point
∵ ? ABC+？ CBE= 180？
? ABC+？ D= 180？
CBE=？ D 3 Dian
In △CBE and △CDF
? CBE=？ D
? BEC=？ Computer fluid dynamics (computational fluid dynamics)
CE=CD
△ CBE△ CDF (AAS) 6 points.
(2)∫from( 1)△CBE?△CDF(AAS)
? BE=DF
In △AEC and △AFC,
CE=CF
Communication = communication
? AEC=？ automatic frequency control
△ AEC△ AFC (HL) 9 points
? AE=AF
? AB+AD=AE+AF