kuyy bagi yang pinter matematika tolong bantu yaa,,thanks

2. C, karena L = [tex] \pi [/tex] r² = 1/4 D² [tex] \pi [/tex]
4. K = [tex] \pi [/tex] x D = 22/7 x D = 154
D = 154 x 7 / 22 = 49 cm
Maka r = 24,5 cm (D)
5. K = [tex] \pi [/tex] x D = 19 [tex] \pi [/tex]
maka D = 19 cm
Luas = [tex] \pi [/tex] 1/4 D²
= 90,25 [tex] \pi [/tex] cm² (C)