tolong dijawab ya pakai jalan yah

No. 25 :
Keliling ½ lingkaran = ½ x (3,14 × 20) = 31,4
keliling trapesium = 12 + 14 + 30 = 56

keliling Gabungan = 31,4 + 56 = 87,4 cm (b)

no. 26
Panjang persegi panjang = 242 : 11 = 22
Keliling = 2 x ( panjang + lebar)
= 2 × ( 22 + 11)
= 2 × 33
= 66 m (d)

no. 27 :
Luas Permukaan balok = 2 x (pl + pt + lt )
= 2 × [ (24 × 18) + ( 24 × 12) + (18 × 12) ]
= 2 × ( 432 + 288 + 216)
= 2 × 936
= 1.872 cm² (c)

no. 28
volume =½ πr²t
= ½ x 22/7 × 7 × 7 × 12
= ½ × 1848
= 924 cm² (c)