hitunglah diameter lingkaran jika kelilingnya a.1256cm,b.2200cm,c.3140cm

a. 1256 = π.d
→ d = 1256/π
→ d = 1256/3,14
→ d = 400
→ r = 200

b. 2200 = πd
→ d = 2200/π
→ d = 2200 / 22/7
→ d = 100. 7
→ d = 700
→ r = 350

c. 3140 = πd
→ d = 3140.π
→ d = 3140.3,14
→ d = 1000
→ r = 500