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a. L prsegi=s.s=14x14= 196
L set.lingkarn= 1/2 phi.d= 1/2. 22/7. 14 = 22
Lprsegi-Lsetlingkarn=196-22= 174
b. L persegi = 10x10= 100
L lingkrn = phi.d = 3,14 x 10= 31,4
100-31,4 = 68,6