Bantu jawab nomor 1 dan 2 pakai cara makasi

No. 1
k= π x d
616 = 22/7 x d
d = 22/7 : 616
d = 7/22 x 616
d = 4312/22
d = 196 cm

1).K=616
2πr=616
πr=308
22r/7=308
22r=2156
r=98 cm
2).r=1/2(d)
r=1/2(21)
r=10,5
a).L=1/2(π)(r)²
=1/2(22/7)(10,5)²
=11/7(110,25)
=11(15,75)
=173,25 cm²
b).K=(π)(r)
=22/7(10,5)
=231/7
=33 cm
semoga membantu......