tolong bantu kerjakan semuanya pakai caranya yaa✌

29.
keliling = 43 + 18 + 18 + 43 = 122 cm (D)

30. 
1/2 x (atas+bawah) x tinggi
= 1/2 x (17 + 8+17+8) x 17
= 1/2 x 50 x 17
= 425 cm2 (A)

31. 
Keliling = 
= busur + 2 jari-jari
= 90/360 x 2 x pi x r + 2 x r
= 1/4 x 2 x 3,14 x 30 + 2 x 30
= 47,1 + 60
= 107,1 cm

32.
keliling = 4 x 40 = 160 m = 16000 cm
jumlah = 16000:160 = 100 tanaman (B)

33. keliling
= 2 x pi x r
= 2 x 22/7 x 24,5
= 154 cm (C)

34.
r = 1/2 d = 1/2 x 32 = 16
Luas
= pi x r x r
= 3,14 x 16 x 16
= 803,84 cm2