Question

Tentukan panjang jari jari dan diameter lingkaran jika kelilingnya 110 cm

Answer 1

K = πd
110 = 22/7 × d
d = 110 x 7/22
d = 35
2r = d
r = 35/2
r = 10, 5

Answer 2

K Lingkaran = 110cm
    2r = 110
    2 x 22/7 x r  = 110
        44/7 x r    = 110
               44r    = 7 x 110
                  r     = 770/44
                        = 17,5 cm

jari - jari = 17,5cm
diameter = 2 x jari - jari
              = 2 x 17,5
              = 35 cm