tolong segera dijawab no 14 - 20 saja

(14)
Luas trapesium = 1/2 x (14 + 36) x 28 = 1/2 x 50 x 28 = 700
Luas 1/2 lingkaran = 1/2 x 1/4 x 22/7 x 28 x 28 = 308
Luas gabungan = 700 + 308 = 1006 cm² (A)
(15)
Volume = luas alas x tinggi
= 3,14 x 15 x 15 x 60
=42.390 cm³ (A)
(16)
Volume = luas alas x tinggi
= 1/2 x 12 x 8 x 45
=2.160 cm³(B)
(17)
Luas = 1/4 x 22/7 x D²
3.850 = 1/4 x 22/7 x D²
3.850 x 28 = 22 x D²
107.800 = 22 x D²
107.800/22 = D²
4.900 = D²
70 = D (C)
(18)
Luas 2 segitiga = 1/2 x 14 x 12 + 1/2 x 14 x 20 = 84 + 140 = 224 cm²
Luas persegi panjang = 12 x 20 = 240 cm²
Luas gabungan = 224 + 240 = 464 cm²(A)
(19)
Volume = luas alas x tinggi
=1/4 x 22/7 x 21 x 21 x 54
= 18.71 cm³(A)
(20)
soalnya gak kelihatan