tolong bantu jwb yg nomor 6&7 pke cra ya

6) L1 = p × l
= 1,2 × 6
= 7,2 km²
L2 = ½ × a × t
= ½ × 1,2 × 1,5
= 0,9 km²
Lttl = L1 + L2
= 7,2 + 0,9
= 8,1 km²
luas bangun tersebut = 8,1 km² (tdk ada opsi)

7) L1 = s × s
= 28 × 28
= 784 cm²

d = 28 cm
r = 28 ÷ 2 = 14 cm
L2 = 2 × ½ × π × r²
= 2 × ½ × 22/7 × 14 × 14
= 616 cm²

luas bangun yg diarsir
L = L1 - L2
= 784 - 616
= 168 cm² (D)