tentukan diameter lingkaran yang keliling nya sama dengan 1) 40cm 2)12 cm 3)66 cm 4)100cm 5)140 cm

Rumus keliling lingkaran = π x d

1) 40cm = π x d <=> 40cm= 3,14 x d
d = 40cm/ 3. 14
d = 12,74cm

2) 12cm = π x d <=> 12cm = 3,14 x d
d = 12cm/ 3. 14
d = 3,83cm

3) 66cm = π x d <=> 66cm = 3,14 x d
d = 66cm/ 3. 14
d = 21,02cm

4) 100cm = π x d <=> 100cm = 3,14 x d
d = 100cm/ 3. 14
d = 31,85cm

5) 140cm = π x d <=> 140cm = 3,14 x d
d = 140cm/ 3. 14
d = 44,59cm