Wei Zi Fence Weaving Seedling

Figure 2

Whether according to the sealing method of Figure 1 or Figure 2,

1: the fence length of vegetable seedlings is equal to the perimeter of two semi-circles, that is, the perimeter of a garden +2 times the diameter.

2. Is the area planted with peppers equal to? Rectangular area-what are the areas of two semicircles? Equal to rectangular area-circular area

Therefore:

( 1)

The fence length of vegetable seedlings =πD+2D=4π+2*4=20.57? rice

(2)

Pepper planting area =4*8-πr? =32-2? π= 19.43 ? square meter