Pythagoras number (1)

1.C2 d 3.60/ 13 cm4. 13 5。 Connect b, d, 36cm2.

6.c Pythagorean number (2)

1.C 2。 B 3。 A 4. 130 5.24

real number

1.A 2。 C

3. Positive and negative radical symbol 5 4.2 times radical symbol 2 5.0

5. 1

6.( 1)2 times the root number 2

(2) Root number 3

(3) 14+4 times the root number 3

(4)6

P22 Translation and Rotation

One: AB

Two: 7.5 60

P23

6.(2) Solution: ∫ positive △ABC

∴AB=BC

∫△ABD rotates△△△ ABC.

∴△ABD≌△ABC

∴AB=BC=AD=DC

∴ The quadrilateral ABCD is a diamond.