whongaliem1.a) keliling = 2 x π x r = 2 x 3,14 x 25 = 157 cm b) keliling = π x d = x 2,8 = 8,8 cm 2. panjang tali = 5 x keliling lingkaran = 5 x 2 x x 21 = 660 cm
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apricialivy
1. a. K=3.14x2x25cm=157cm b. K=22/7x2,8dm=8,8dm=88cm 2. tali=5xK=5x22/7x2x21=660cm
= 2 x 3,14 x 25
= 157 cm
b) keliling = π x d
= x 2,8
= 8,8 cm
2. panjang tali = 5 x keliling lingkaran
= 5 x 2 x x 21
= 660 cm
b. K=22/7x2,8dm=8,8dm=88cm
2. tali=5xK=5x22/7x2x21=660cm