Graduation thesis of watchcase

Excuse me, can you tell me the way to the nearest hospital?

Take the second door and you will enter my bedroom.

Third, the answer (the answer requires a written description, proof process or calculation steps. If you think some questions are a little difficult, you can write some answers you can, but don't have any questions below! ***46 points)

22, solve the equation (8 points)

( 1) (2)

23. Drawing questions (6 points) As shown in the figure, in △ABC,? BAC is an obtuse angle, drawn as:

⑴? The bisector ad of BAC;

(2) The center line is on the AC side;

(3) cf on 3)ab side is high.

24.(6 points) Due to the vigorous development of planting and bamboo processing industry in a town, the income of farmers increased by 65,438+05% this year, while the expenditure decreased by 65,438+00% compared with last year. It is known that the balance of income and expenditure last year was 4 million yuan, and it is estimated that the balance this year will be 8.6 million yuan. What was the income and expenditure last year?

25.(5 points) As shown in the figure, straight lines AB‖CD and EF intersect AB and CD at points M and G, respectively. MN bisects ∠EMB and GH bisects ∠MGD, which proves that MN‖GH.

Proof: ∫AB‖CD (known)

∴∠EMB=∠EGD()

∫MN aliquot ∠EMB, GH aliquot ∠MGD (known)

∴∠ 1= ∠EMB，∠2= ∠MGD()

∴∠ 1=∠2

∴MN‖GH()

26.(6 points) As shown in the figure, ∠DAB+∠ D = 180, AC shares ∠DAB, while ∠ CAD = 25, ∠B=95.

(1) Number of times to find ∠DCA

(2) Find the degree of ∠DCE.

27. As shown in the figure, in △ABC, ∠BAC=900, AD⊥BC in D, AE in ∠DAC, ∠B=500,

Find the degree of ∠AEC. (6 points)

28.(9 points) indicates the following points in the plane rectangular coordinate system shown in the figure.