Two:

7.(! ) 25 (2) Root number 2 2 (3)26 (4)9 times root number 2 (5)3 root number 3k

(6)60

8.6 cm 48 cm

9. 169

10.3 or 7

1 1. 10 step

12.25cm

One: BDBCAB

Two:

7.90 degrees

8.5

9.8 4.8

10.120cm

1 1. 17cm

12.( 1)84 85

(2) All these numbers are triangles.

The square of the shortest right-angled side of a triangle is equal to the sum of the hypotenuse and the right-angled side.

(3)

One: BBBCBCBC

Two:

9.( 1) 12

(2) 16

(3) The 7th root of14 is 3.

(4) 5th radical number 2

10.60/ 13

1 1.30

12.S 1=s2=s3

13.5

14.6

15. Root number 3: 2

16.2≤x≤6

(4)

One: BDBDBC

Two:

7.8 6 70 degrees 1 10 degrees

8.8cm 12cm

9.55 degrees 125 degrees 125 degrees

10. 12

1 1. 1.5 3 7.5 7.5

12.26 degrees 120 degrees

13. 16

14.20

(5)

One: BCCDCA

Two:

7.8 6

8.2

9. Two □ABCD AB∨DC AB = BC

□CDEF AB=CD=EF DE=CF

10.DE=BF

(6)

One: DBBCCA

Two:

7.20 8.6

8. 1 12.5

9.5 cm, 2 times the number of roots, 3 cm

10. 10cm

1 1. The number of roots is 5cm 3 and the number of roots is 5cm.

12.8 cm2

13.45 degrees

14.7.5m

15. The number of roots is 5cm.

16.24 cm2

(7)

One: DCDDADCC

Two:

9.40 degrees

10.2 point

1 1.25 times the root number 3.

12.2.5

13. 1 2

14.44

15. Square

16. Rectangle

17. IV

18.4 times the root number 2.

(8)

One: DBBDBCBB

Two:

9.3 0

10.39 cm square

1 1. 1