beserta caranya yaaa

L 1/2 O + L persegi pnjNG
= 1/2.2.VI.R  +  2(P+L)
= 1/2.2.22/7.35 + 2(70 + 100)
= 110 + 340 
= 450 M............................................................................CCC

Keliling persegi panjang :
2 x (p+l) = 2 x (70+100) = 340 m
Keliling 1/2 lingkaran :
1/2 x 2 x π x r = 22/7 x (70/2) = 110 m
=> 340 + 110 = 450 m