nih yg lebih jelas pliss bantu

1.
L lingkaran = phi × r × r

r kecil = 7
r besar = 14

L = 1/2 lingkaran besar + (2 × 1/2 lingkaran kecil)
= (1/2 × 22/7 × 14 × 14) + (1 × 22/7 × 7 ×7)
= 308 + 154
= 462


2.
L layang2 = d1 × d2 ÷ 2
d1 = 8 + 8 = 16
d2 = 15 + 6 = 21

r = 10

L = L layang2 + (2 × 1/4 lingkaran)
= (16 × 21 ÷ 2) + (2 × 1/4 × 3,14 × 10 × 10)
= 168 + 157
= 325