The picture shows the rectangular concrete playground of Yucai School. If a student wants to walk from corner A to corner C, at least walk …

)

I.140m

B,120m

C, 100 m

D, 90 meters

2, the following figures, are irrational ........................... (

)

-0.333…,

,

,

,

3. 14 15,

, 0.0 123456 ... (The decimal part consists of continuous positive integers).

Answer, 2

b，3

C,

four

d，5

3. Hexagons ...

The word 49 12 is omitted here.