Tolong kak.... (8 sampai 10)

8) L = 3060 m²
L trapesium = jumlah sisi sejajar/2 × t
3060 = 70+100/2 × t
3060 = 170/2 × t
3060 = 85 t
t = 3060/85
t = 36 m

9) r = 21 m
L = πr²
= 22/7 × 21 × 21
= 22 × 3 × 21
= 1386 m²

10) L = 1,54 dm²
d = ... cm
L = πd
1,54 = 22/7 × d
d = 7/22 × 1,54
d = 7/0,07
d = 7/7/100
d = 7 × 100/7
d = 100 dm
d = 100 × 10 = 1000 cm = 10³ cm