Yg bawah tolong dijawab skrg

bangun 1 :
rumus = 2 × π × r
2 × 22/7 × 84
= 528
= 1/2 × 528
= 264

bangun 2 :
jumlah sisi = (35 × 2) + 42
= 70 + 42
= 112

total : 376 (a)

semoga membantu :)