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Yijia mathematics
Grade 8 answer 3- 1 1 page

1. Because spring is hopeful and warm.

Because spring is coming, hope is expressed in the face of beauty.

Everyone's heart is full of hope for the Spring Festival.

4. Autumn. Because I was born in autumn. Moreover, I think autumn is easily overlooked, and her faint sadness is beautiful.

Spring blossoms go straight to the point.

Just like: a drop of wine for the driver and two tears for the relatives.

1.3 to 64

2.80

3.△BCE?△CBD△BFE≌CFD AAS△ADB?△AEC

4.BC=EF

5.90

6.D

7.D

8.B

9. At the same time ∵△ EBC△ DBA (10. (1)∫ BC ⊥

∴∠ADB=∠ADC

In △ABD and △ACD.

∠B=∠C

∠ 1=∠2

AD=AD

∴△ABD≌△ACD

AB=AC

(2) It cannot be proved that SSA does not exist.

(3) As a midline advertisement on the BC side.

∴BD=CD

In △ABD and △ACD.

AB=AC

AD=AD

BD=CD

△ABD?△ACD

∠B=∠C

11.(5+7) x2 = 24cm

1.eschite is healthy and not invited.

2. Think about a number with almost no different stomachache.

3.CBBACDAB

4.CDFHGEBA

1. Respect and love

2. No, Wang vividly depicts Mr. Jin's aging.

I can't seem to remember clearly, but I still can't remember what happened.

4. Teacher Jin is old.

Mr. Jin loves his students as much as his own children, asking for nothing in return.

5. Beautiful mountains and rivers

6. Self-confidence, inferiority, tolerance and stingy distance dependence

7. Knife to knife, gun to gun, enhancing the democratic atmosphere.

1.2 to 3 pairs

DC BD divides equally ∠ABC DE⊥AB DC⊥BC.

8 2 8

2.3 cm

3.HL BC ∠C

4.B

5.C

. A

12-30 pages

7. The mark ∠BAD is ∠ 1, while ∠FAD is ∠2.

∵AD is the bisector of∝∠ ∝∠BAC.

∴∠ 1=∠2

∵DE⊥AB DF⊥AC

∴∠E=∠DFA=∠DFC=90

In △AED and △AFD,

∠ 1=∠2

∠E=∠DFA

AD=AD

△AED?△AFD

∴FD=ED

In Rt△DEB and △RtDFC.

DB=DC

ED=FD

DEB≌DFC

BE=CF

8. Existence

five

better

fifth

one

request

Come and help

the best

Be careful

do

buy

Jinfei

2.CBBDDBAACBACDAD

Do you want to watch the World Cup now?

What does he want to be when he grows up?

Yes, they are.

What are they going to do tonight?

There is a photo on that desk.

4. See page 62.

1. Bozi

surname

Fu; Feed unit

The seventh note of the major scale

I support Finland, because I think children in China need this kind of education.

Step 3 be overjoyed

4. Teach people tirelessly and be unknown

1.MN AB

2.(2,-3)

3. equilateral triangle

4.60

5.60

6.B

7.B

8.C

9. Find the symmetry point of point B, connect A, find the intersection point with the river bank, and translate D to the intersection point.

10. confirmed

Connect AP BP CP

1/2×h 1×a b+ 1/2×H2×BC+ 1/2×H3×BC = 1/2×h×BC

h 1+h2+h3=h

wrong

h 1+h2+h3>h

1 1. See page 18.

1.CCDCC

2. Animals

forget

leg

table

Pig dog

unequal to

6. The market is not good and shoes are not popular.

The market is good and shoes sell well.

7. Time is money

Friendship lasts forever/friendship lasts forever

Whoever seizes the opportunity will get what he wants.

Conquering oneself is the greatest of all victories.

Step 8 omit

1. plus or minus 8 plus or minus 3.

2. plus or minus 2

3. 1

4.4

5. Positive and negative cube root number 5

6.C

7.D

8.D

9.A

10.C

1 1.-2

-8

3/4

500

3.6

50

12.X=3/2

X=4

X=2/3

X= 17/2

13.x-y =-5/11or -7/ 1 1.

(2) 12 1/289 or 12 1/25

14. cube root number a-b+2=2- cube root number 7 or 2+ cube root number 7.

15.X-2Y=3。

2X-3Y=5

X= 1 Y= 1 is deduced.

The square root of X-8Y is plus or minus 3, and the cube root is plus or minus 9.

16.6003/a

17. See page 18.

1. When?

Feel happy for yourself.

how to do

Step 2 go fishing

tell

swim

have

Existence; become

Better work

largest

Don't get it

3.CBABABDABC

4. Tolstoy

Wang Wei

Lu Xun

Confucius

5. See page 62.

1. "She" knows what the old man in the reception office is going to say. I also know that "she" can't go home, can't go back to her past life, and can't make up for her son's regret.

Rub, taste, pick and jump.

He met his former mother.

4. See you later and look forward to it

5. 14 1 year

leave out

1.S=( 10-X) 0 1/2

5.6 7

6.A=(n-2)× 180 n≥3

7.B

8.C

9.D

10. A]

1 1.Y 1= 150X

Y2= 160X- 160

150 x≥ 160 x- 160

X≤ 16

(1) When x= 160, Y 1=Y2.

(2) when x > 16, y 1 < y2.

(3) when x < 16, y 1 > y2.

12.O